add date conversion test on document field set.
Tested HZ with a ring of queues
Merge branch 'develop' of github.com:orientechnologies/orientdb into develop
fixed LINKSET update on identity change. issue #2949
Merge branch 'develop' of github.com:orientechnologies/orientdb into develop
Merge branch 'develop' of https://github.com/orientechnologies/orientdb into develop
Fixed issue #2986
cleaning up identity change listeners, finishing issue #2949
JDK RW lock was replaced by SpinRWLock in modification lock.
Merge branch 'develop' of github.com:orientechnologies/orientdb into develop
Merge branch 'develop' of https://github.com/orientechnologies/orientdb into develop
Merge remote-tracking branch 'nuvo/develop' into develop