Disable magnum-k8s, as it currently is non-functional.
Override wait_for_all_endpoints, detailing which service returns which
error code.
Disable watcher-k8s, as it is flaky at the moment.
Change-Id: I5ff28f039292bbf91fe9ec3f893017d19f3cd078
Signed-off-by: Guillaume Boutry <guillaume.boutry@canonical.com>