Add a testcase that checks remote client transaction afinity in case of failed server

The remote client transaction affinity is not well covered in testsuite.

Particularly, it would be good to test what happens when a transaction starts on a standalone client. The call goes to a stateless bean. There are two servers started in server that the client can choose. The client starts transaction, calls the bean and then the server fails. Will be the next call to bean fails correctly? (as it could be expected as the affinity points to the non-existent server, despite the fact there is another server deploying the same stateless bean)