21.04 libraries freeze for charms on master branch
* charm-helpers sync for classic charms
* build.lock file for reactive charms
* ensure tox.ini is from release-tools
* ensure requirements.txt files are from release-tools
* On reactive charms:
- ensure stable/21.04 branch for charms.openstack
- ensure stable/21.04 branch for charm-helpers
Rebuild gnocchi charm to pick up the charms.openstack change which
creates the ceph pool based upon the name of the application deployed
rather than the name 'gnocchi'.
* Update requirements.txt to pin charm-tools to 2.8.3
* Update tox.ini to change the build parameters.
* This upgrades from <2.7 which adds reproducible charms
* Bug was fixed that controlled the default output directory
doesn't get 'builds' appended. The tox change puts it
back so that stable & master both build to the same
directory. This may be reviewed in the future.