Added case3 and case4 for testing mergeRecords with events.
Commit for merge:
Added new cases.
Removed old UsagePollerTest and renamed UsageProcessorTest2 to UsageProcessorTest.  Added case7 for testing wtih events.
Added processrecordswithnopreviousrecords test class.
Merge branch 'five_minute_poller_refactor' into pur_branch
Updating tests for Usage Event Processing
Added new case8.  Refactored the service layer to return a map of a map of a list of loadbalancerhostusage records.  Caused major refactor of existing usages.
Testing Usage Event processing. Code is deploying at this point...
Merging five_min_poller branch to pur_branch
Updating event processor test for map object changes