Smoke test fails sporadically on MacOS

[headius]

Sometimes this smoke test fails, annoyingly often when I go to release.

Expected:

    [INFO] --- exec-maven-plugin:1.4.0:exec (execute) @ jnr-unixsocket ---
    connected to [family=PF_UNIX path=/tmp/fubar.sock]
    read from server: blah blah
    SUCCESS

Actual:

    [INFO] --- exec-maven-plugin:1.4.0:exec (execute) @ jnr-unixsocket ---
    Exception in thread "main" java.io.IOException: No such file or directory
    	at jnr.unixsocket.UnixSocketChannel.doConnect(UnixSocketChannel.java:130)
    	at jnr.unixsocket.UnixSocketChannel.connect(UnixSocketChannel.java:139)
    	at jnr.unixsocket.UnixSocketChannel.open(UnixSocketChannel.java:68)
    	at jnr.unixsocket.example.UnixClient.main(UnixClient.java:46)

Probably should look into why this happens. Re-running usually works.