Rework ansible config validation
Rework ansible config validation

Current jsonschema validation of ansible
config, don't provide detailed info about
what are the validation issues, that is
why we can't handle properly config issues.

New flow introduce more suitable way,
which will warn for non critical issues
and it will fail for the critical one.

Change-Id: I0a5a4e2eab02d71e8b68bf87d9b99339e63f60cb

redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared