[backend-infinispan] Fix typo in logger class
[backend-jvstm-infinispan] Fix typo in optional config parameter
[jvstm-infinispan] Close repository on shutdown()
Initial work on clustering support for all JVSTM-based backends

  * Use Hazelcast for group communication
  * Obtain serverId independent from the repository and use it to initialize
    DomainClassInfo
  * The first node to join the cluster is the only one responsible for full
    initialization of the Framework's infrastructures (e.g. DomainRoot, etc.)
  * Other cluster elements wait for the first member to complete startup
    before booting.
  * Update dependencies on Infinispan and JGroups so that they match