Add backend-jvstm-infinispan
[backend-jvstm-ispn] make JvstmIspnBackEnd extend from jvstm-common's
[backend-jvstm-common] Invoke Repository.init during BackEnd init

  * Cosmetic adjustments to JvstmInFenixTransaction
[backend-jvstm-infinispan] Adjust API to comply with jvstm-common

  * Correctly extend JVSTMConfig and JVSTMBackEnd
[test-backend-jvstm] Parameterize POM to enable use of other code generators
[backend-jvstm-infinispan] Add InfinispanRepository
[test-backend-jvstm-common] DRAFT: Add infinispanNoFile.xml
[backend-jvstm-infinispan] DRAFT: Add InfinispanRepositoryUtil