[jvstm-lf] Minor optimization when computing UUID.toString often
[jvstm-lf] Only committer thread writes mapping txVersion->commitId
[core] Fix schema version in jgroups config file
[core] Upgrade JGroups 3.3.1.Final -> 3.4.0.Final
[jvstm-lf] Substitute JGroups for Hazelcast as the group communication system
[jvstm-lf] Substitute JGroups for Hazelcast as the group communication system (part 2)
[jvstm-lf] TempFix: jgroups startup dropping duplicates due to blocking
[jvstm-lf] Use separate thread to handle commit requests (free JGroups delivery thread from having to wait)
hacks