rename test class

(TransactionalTest_1 -> TransactionalTest)
(TransactionalTest_1_Service -> TransactionTestService)
- by default, maven surefire doesn't pick up tests unless they have
  certain suffixes (source: http://maven.apache.org/surefire/maven-surefire-plugin/examples/inclusion-exclusion.html)
- test case still doesn't work after renaming