Issue #2235 was partially fixed (no flush periodic task).
Merge remote-tracking branch 'origin/develop' into develop
Minor: replace OSingleItemSet with Collections.singleton()
Fixed multi-thread problem with parallel query
Issue #2235 was fixed. Flush periodic task.
Default value of storage.diskCache.writeCacheFlushInactivityInterval was changed to 1 min.
Merge branch 'develop' into parallelquery
Minor: changed log from info -> debug
Parallel execution: used worker threads centralized in Orient singleton instance