Implement lifecycle for Jena/Sesame/Etc

[antonkulaga]

I see that lifecycle is not implemented anywhere. I think that possible Sesame implementation is

implicit val repositoryLifecycle:Lifecycle[Rdf, Sail] = new Lifecycle[Rdf,Sail] {

    override def start(sail:Sail): Unit = sail.initialize()

    override def stop(sail:Sail): Unit = sail.shutDown()
  }

But in such case we should change how GraphStoreTest works. Not it is something like:

class SesameMemoryGraphStoreTest extends SesameGraphStoreTest({
  val repo = new SailRepository(new MemoryStore)
  repo.initialize()
  repo.getConnection()
})

Here you pass connection to the test and consider the connection to be an RdfStore. But in case of start/stop we should also pass sail and apply lifecycle to sail.