Add --automated_retry to the reproduce command.

by giving the flag to the command, user can automated the actual retry
runs. Set to run up to 30 times by default, but stops when all the test
cases has passed or the number of failed/skipped test cases has not
changed.

Test: mma
Change-Id: Id43729b9a8d321b2169ac6a88c82546e9c8378b1