Explicitly specify that availabilityStartTime is UTC
Explicitly specify that availabilityStartTime is UTC

- Adding a 'Z' at the end means it is in UTC time.

Change-Id: I2e876c81449adcf3878e6d0d2b3c74f34edc8963

nevil/edash-packager,nevil/edash-packager,nevil/edash-packager