Restore "OmapLock: release RPC lock while sleeping"" #1716

Job	Run time
build	2m 37s
build	8m 57s
build-ceph	2m 39s
build-ceph	2m 13s
pytest	1s
discovery	1s
ha	1s
demo	1s
demo	3m 47s
push-to-registry	1s
push-to-registry	0s
pytest (cli)	2m 8s
pytest (cli_change_lb)	2m 14s
ha (sanity)	3m 52s
pytest (state)	2m 11s
ha (state_transitions)	3m 26s
pytest (multi_gateway)	2m 18s
ha (state_transitions_both_gws)	9m 12s
discovery (container)	3m 54s
pytest (server)	2m 30s
ha (state_transitions_loop)	11m 40s
discovery (embedded)	4m 2s
pytest (grpc)	2m 58s
ha (state_transitions_rand_loop)	14m 44s
pytest (omap_lock)	4m 56s
ha (late_registration)	4m 36s
pytest (old_omap)	1m 59s
ha (late_registration_loop)	15m 49s
pytest (log_files)	3m 27s
ha (4gws)	5m 40s
pytest (nsid)	3m 23s
ha (4gws_loop)	7m 0s
pytest (namespaces)	6m 52s
	2h 19m 9s

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