Use tempest-multinode-full parent for multinode Zuul jobs

This patchset uses the recently added [0] tempest-multinode-full
parent for multinode Patrole Zuulv3 jobs. This patchset also
fixes some trivial docstring errors related to [1].

[0] https://review.openstack.org/#/c/545724/
[1] https://review.openstack.org/#/c/570262/

Change-Id: Ib13663b582f0c57a28ec4b18129b83ab5ba95cfe
6 files changed