[3.6][Backport] Prune orphaned blobs on registry storage#16126

Merged

openshift-merge-robot merged 5 commits intoopenshift:release-3.6from miminar:origin3.6-registry-prunes-orphanes

Sep 8, 2017

+1,347-214

Commits on Sep 4, 2017

Add -prune option to dockerregistry

Oleg Bulatov
authored and
Michal Minář
committed
Exit normally if registry's storage is empty
Michal Minář
committed
Extended test for registry garbage collector
Michal Minář
committed

Commits on Sep 7, 2017

extended: fixed registry tests
Michal Minář
committed
extended: Skip test instead of failing
Michal Minář
committed