fix(scheduler): send environment to the process
fix(tests): check for immovable response

"Deis" in "Powered by Deis" is configured by an environment variable
called $POWERED_BY. We should not be checking for Deis, as it can be
defined as something else.
Merge pull request #2627 from bacongobbler/fix-bash

fix(scheduler): send environment to the process
fix(contrib/digitalocean): use beta channel on DO
Merge pull request #2631 from carmstrong/do-beta

fix(contrib/digitalocean): use beta channel on DO