OCM: Fix open driver #2956

Job	Run time
go	11s
integration	1m 39s
docker (docker/Dockerfile.revad) / docker	1m 53s
docker (docker/Dockerfile.revad-eos) / docker	42s
docker (docker/Dockerfile.revad-ceph) / docker	26s
docker (docker/Dockerfile.reva) / docker	30s
docker (docker/Dockerfile.revad-eos) / docker	40s
acceptance-1 / compose	1m 45s
acceptance-2 (3) / compose	4m 53s
acceptance-2 (1) / compose	4m 21s
acceptance-2 (2) / compose	8m 55s
acceptance-2 (4) / compose	5m 54s
acceptance-2 (5) / compose	6m 17s
acceptance-2 (6) / compose	11m 24s
litmus (litmus-1) / compose	54s
litmus (litmus-2) / compose	54s
	51m 18s

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