Added 2nd case for usagepollerhelper.processCurrentUsage.
Added 3rd case for usagepollerhelper.processCurrentUsage.  Tests having no events with usage and resets.
Added 4th case to test UsagePollerHelper.processCurrentUsage.  Tests existing records that have events but no usage.
Unignored tests in UsageProcessorTest that were failing but the bugs were fixed.
Added 5th test case for UsagePollerHelper.processCurrentUsage.  Tests previous records had events and usage.
Added 6th test case for UsagePollerHelper.processCurrentUsage.  Tests previous records with events and resets.
Added 7th case to UsagePollerHelper.processCurrentUsage.  Tests that it only uses the last events.
Changed name of table in dbunit xml files for UsageRollupProcessor to approprite hibernate name.
Merge branch 'usage-refactor-brandon' into usage-refactor