Merge PR #41314 into master

* refs/pull/41314/head:
	qa/tasks/nfs: add test to check if cmds fail on not passing required arguments
	mgr/nfs: fix flake8 missing whitespace around parameter equals error
	mgr/nfs: annotate _cmd_nfs_* methods return value

Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>