Update nightly start time to 8:00 EDT.

Change-Id: I360ab65a75d25ce3552391916582a63d59096d6c
Update nightly starttime to 7:00 EST (so 8:00 EDT in summer).

Change-Id: I3188e54bcd1f80f186acb3bdff62504c221144d8
Merge topic 'update_nightly_start_time'

343dffd Update nightly starttime to 7:00 EST (so 8:00 EDT in summer).
0252d28 Update nightly start time to 8:00 EDT.