Added an index to support the upsert in chroncontrolevents. Also added an upcert function in chron control events.
Added an index to support the upsert in chroncontrolevents.
Also added an upcert function in chron control events.

NeotomaDB/Neotoma_SQL,NeotomaDB/Neotoma_SQL,NeotomaDB/Neotoma_SQL