Merge PR #38481 into master

* refs/pull/38481/head:
	qa/vstart_runner: inherit methods instead of duplicating them
	qa/ceph_manager: make it possible to reuse few methods
	qa/vstart_runner: don't use "shell=False" in run_ceph_w()
	qa/ceph_manager: minor refactor

Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>

diff --cc qa/tasks/vstart_runner.py
Simple merge