* charm-helpers sync for classic charms
* charms.ceph sync for ceph charms
* rebuild for reactive charms
* sync tox.ini files as needed
* sync requirements.txt files to sync to standard
If allowed_nets is set ensure that the CIDR's for the remote
units on the dns-backend relation are also included in the
allow-query configuration stanza.
This ensures that designate can validate that zone updates
have been correctly transferred to all BIND servers.
Remove upper bound on flake8 and tidy misc lint on codebase.
Note that one of the warning messages signalled that a parameter
was not used in a format call. This may or may not be correct
but this commit sticks with the existing behaviour.