Remove Finished Queries from Grill Server memory and Serve Results and Status from Database
Addressing Review Comments.
Check if the output result path is file or folder in the getHttpResult.
Adding a timer task to SnapShot Grill Services at regular interval.
Merge remote-tracking branch 'upstream/develop' into finished-persister
Making PersistGrillServices method synchronized. Changing snapshot interval to 5 minutes instead of 5 hours.
Merge pull request #79 from sreekanth-r/finished-persister

Remove Finished Queries from Grill Server memory
sync with develop