The critical part of this commit is adapting code that was still
sourcing env-vars. This file was removed from Bifrost in the Victoria
release, breaking the `kayobe seed deployment image build` command.
The other changes are not yet breaking Kayobe:
1) Release notes claim that OpenStackClient is no longer installed when
keystone is not enabled, but it appears to still be available. Use
the ironic native baremetal command instead except in playbooks
related to baremetal compute nodes (i.e. overcloud ironic).
2) The use of OS_CLOUD=bifrost-inspector is deprecated and should be
replaced by OS_CLOUD=bifrost.
Change-Id: I25078e69acdf41a4ef9957f99fe5047de54b778d
Story: 2008558
Task: 41696
f3c0526c09