Update notes for submitted changes

* When the collector service is restarted, contrail-analytics.rules takes care of flushing the UVE db in redis. However, when supervisor-analytics service is restarted, then old UVEs remain in the redis. This is because redis is no longer part of the supervisor-analytics. Therefore, flush the UVE db from redis when collector connects to redis for the first time. Closes-Bug: #1347133