I am working on an experimental approach to running the MNAIO playbooks
in a local docker container with osa and osa-ops already checked out and
volume-mounted into the docker container. This change supports that
approach by making the git clone step optional in the deploy-osa.yml
playbook.
Also, don't force update the OSA repo.
Change-Id: I5312e88d4f41033a223d145e72f0767be45adda1