This is a followup to the prior fix that addressed the path issue. Now
we have the problem of docker-compose attempting to allocate a tty (the
default) which isn't possible by default under cron. We don't need a tty
so we pass -T to disable tty allocation in the first place.
I should've caught this the last time around but my testing didn't catch
it because I was running from a shell.
Change-Id: I57797c8d140335d9edcdcd324239fdefb09882d4
f1bc64a58e