update subscription details in persister

Persister updates MMS transaction in data base with subscription
as zero initially and clients will update the subscription details
later. If transaction service is reading the data base before updating
the proper subscription then there will be a chanse of DDS not switching
back to original subscription.

Updating subscription details in persister itself for MT MMS.

Change-Id: Ib28080afc29db086cafa88140922a17f6d48eeda
CRs-Fixed: 665308