Temp changes to support ROC with new scan module.
Need to be removed once P2P module is ready.
Change-Id: I50a924c233da6780de746f30aacf8dfb4cd89806
CRs-Fixed: 1095299
-Fix memory leaks in scan start and stop request by freeing the
request if posting to scheduler fails.
-Populate scan event id based on target.
Change-Id: I169c4f3c141dc1af48954788dc74d235afd59c9e
CRs-Fixed: 1095299