* charm-helpers sync for classic charms
* rebuild for reactive charms
* ensure tox.ini is from release-tools
* ensure requirements.txt files are from release-tools
* On reactive charms:
  - ensure master branch for charms.openstack
  - ensure master branch for charm-helpers

Change-Id: I73cdbc4f9a444cb3bc5e9daa4d1cc038b5ed26c5