Merge PR #38668 into master

* refs/pull/38668/head:
	osdc: Fix return type of map waiting functions
	monc: Use post rather than defer
	common/async: Hold lock in constructor of blocked_result
	osdc: Don't keep wrapping completion in wait_for_latest_osdmap
	neorados: Replace unsafe uses of dispatch with post

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