Added numVips and tagsBitMask to polledUsageRecord.
Added tagsbitmask logic and tests for no events.  Added logic to use concurrent connections that will be in the 5 minute table to calculate average concurrent connections.
Added tests for multiple hour usage.
Test name changes and added assertions to existing tests.  Changed eventType in polledRecord to enum and not string.
Moved PolledUsageRecord to persistence module.
Renamed PolledUsageRecord to LoadBalancerMergedHostUsage
Merge branch 'snmp-feature' into usage-refactor