Goal: 

Move functional tests from watcher-tempest-plugin to python-watcherclient.

Here is the link to launchpad bug.

Reviews

• Move functional tests from watcher_tempest_plugin to watcherclient
• Add deprecation about client_functional tests
• Replace watcherclient functional job with python-watcherclient-functional
• Drop watcherclient-tempest-functional job
• Use zuul clonned repos for upstream in build_openstack_packages role
• Improvements to zuul job related to operator image and tempest
• Set NNCP_DNS_SERVER in kuttl deploy-deps.yaml playbook

Definition of Done:

Functional tests should live under python-watcherclient repo.