Ensure that fixture charms in bundles don't updated to ~openstack-charmers from ~openstack-charmers-next during release

[ajkavanagh]

This is an oddity, but basically there is no stable version of the fixture charms, and this breaks those bundles. These charms are:

• keystone-kerberos
• neutron-api-plugin-arista
• trilio-horizon-plugin
• trilio-data-mover
• trilio-wlm
• trilio-dm-api

These need to be handled by the do-batch script and friends so they don't get updated during the release.

[lourot]

Same thing for the reference to the quagga charm in charm-neutron-dynamic-routing. quagga doesn't seem to exist under https://jaas.ai/u/openstack-charmers/quagga