Compatibility with vert.x 4

[anoopdarshan]

Description

One of our vertx projects using brave-instrumentation-vertx-web for tracing interceptor started breaking after upgrading to vert.x 4 , later realised that tracing interceptor is breaking as latest brave-instrumentation-vertx-web is not yet compatible with vertx 4.x

As vert.x 4.x has removed the following API io.vertx.core.http.HttpServerRequest.rawMethod(), there are breaking changes with vertx 4.x upgrade, one of them being -

java.lang.NoSuchMethodError: 'java.lang.String io.vertx.core.http.HttpServerRequest.rawMethod()'
	at brave.vertx.web.TracingRoutingContextHandler$HttpServerRequestWrapper.method(TracingRoutingContextHandler.java:95)
	at brave.http.HttpRequestParser$Default.spanName(HttpRequestParser.java:80)
	at brave.http.HttpRequestParser$Default.parse(HttpRequestParser.java:69)
	at brave.http.HttpHandler.parseRequest(HttpHandler.java:58)
	at brave.http.HttpServerHandler.parseRequest(HttpServerHandler.java:143)
	at brave.http.HttpHandler.handleStart(HttpHandler.java:40)
	at brave.http.HttpServerHandler.handleReceive(HttpServerHandler.java:112)
	at brave.vertx.web.TracingRoutingContextHandler.handle(TracingRoutingContextHandler.java:57)
	at brave.vertx.web.TracingRoutingContextHandler.handle(TracingRoutingContextHandler.java:38)
	at io.vertx.ext.web.impl.RouteState.handleFailure(RouteState.java:1273)
	at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:160)
	at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:141)
	at io.vertx.ext.web.impl.RoutingContextImpl.doFail(RoutingContextImpl.java:543)
	at io.vertx.ext.web.impl.RoutingContextImpl.fail(RoutingContextImpl.java:192)
	at io.vertx.ext.web.impl.RoutingContextImpl.fail(RoutingContextImpl.java:181)
	at io.vertx.ext.web.impl.RoutingContextImplBase.handleInHandlerRuntimeFailure(RoutingContextImplBase.java:199)
	at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:168)
	at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:141)
	at io.vertx.ext.web.impl.RouterImpl.handle(RouterImpl.java:72)
	at io.vertx.ext.web.impl.RouterImpl.handle(RouterImpl.java:37)
	at io.vertx.core.http.impl.Http1xServerRequestHandler.handle(Http1xServerRequestHandler.java:67)
	at io.vertx.core.http.impl.Http1xServerRequestHandler.handle(Http1xServerRequestHandler.java:30)
	at io.vertx.core.impl.EventLoopContext.emit(EventLoopContext.java:56)
	at io.vertx.core.impl.DuplicatedContext.emit(DuplicatedContext.java:174)
	at io.vertx.core.http.impl.Http1xServerConnection.handleMessage(Http1xServerConnection.java:145)
	at io.vertx.core.net.impl.ConnectionBase.read(ConnectionBase.java:155)
	at io.vertx.core.net.impl.VertxHandler.channelRead(VertxHandler.java:153)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93)
	at io.netty.handler.codec.http.websocketx.extensions.WebSocketServerExtensionHandler.channelRead(WebSocketServerExtensionHandler.java:99)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at io.vertx.core.http.impl.Http1xUpgradeToH2CHandler.channelRead(Http1xUpgradeToH2CHandler.java:116)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:327)
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:314)
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:435)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:279)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at io.vertx.core.http.impl.Http1xOrH2CHandler.end(Http1xOrH2CHandler.java:61)
	at io.vertx.core.http.impl.Http1xOrH2CHandler.channelRead(Http1xOrH2CHandler.java:38)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:829)

Expected Behaviour

Need to make brave-instrumentation-vertx-web compatible with vertx 4 as vertx 3.x has unfixed CVEs