Downgraded 'returning UTC Timezone' from a warning to info because don't care about it in NewRelic.
Downgraded 'attempt to update connector data with a null timeInterval' from a warning to info because don't care about it in NewRelic.
Added non-fatal handling for the case where an UpdateWorkerTask in the process of an update is deleted, which happens when a connector is deleted.  Also changed cleanup to leave UpdateWorkerTask and ApiUpdates for a week rather than a day.