* use stable/21.10 libraries
* use zaza/zaza-openstack-tests at stable/21.10
* build.lock files for reactive charms
* bundles refer to ~openstack-charms candidate channel
* update tox/pip.sh to ensure setuptools<50.0.0
All of the test bundles deploy ironic-api in HA with hacluster,
however the bundles were using individual overlays that required
new overlays to be defined for each new bundle. Instead, let's
use a single local-charm-overlay.yaml.j2. This handles the
situation similar to how charm-octavia does.
With recent changes to zaza, the tests will hang due to zero units
of neutron-openvswitch being deployed. This is fixed by adding the
missing neutron-openvswitch relations.
