Add the use-os-brick-api-client patch

Change-Id: I3f74c33d1a8260a766272ff985aaba12eee79053
diff --git a/patches/series.experimental b/patches/series.experimental
index 125c9ca..6caca64 100644
--- a/patches/series.experimental
+++ b/patches/series.experimental
@@ -9,6 +9,7 @@
 openstack/cinder/sep-sp-clone-volume.patch
 openstack/cinder/sep-clone-across-pools.patch
 openstack/cinder/sep-sp-clone-across-pools.patch
+openstack/cinder/use-os-brick-api-client.patch
 openstack/cinder/sep-sp-iscsi.patch
 openstack/cinderlib/storpool-test-20190910.patch
 openstack/devstack/eatmydata.patch