Administration of CloudWatch alarms - EUCA-8074

Authorized users can now describe, modify and delete CloudWatch alarms.
When referencing an alarm from another account the ARN for the alarm
must be used rather than the name.

EUCA-8074
Administration of CloudWatch alarms update fix - EUCA-8074

Ensure update Predicate is applied to all alarm entities.

EUCA-8074
Administration of CloudWatch alarms, DescribeAlarmsForMetric - EUCA-8074

Update authorization checks for DescribeAlarmsForMetric action so it is
consistent with DescribeAlarms.

EUCA-8074
Merge remote-tracking branch 'origin/dev/sjones/EUCA-8074' into maint/3.4/testing