Add the "use storpool's api for attach/detach" patch.

Change-Id: Ic24fe4f0df773c9e2d128bb296d293bfb9a93436
diff --git a/patches/series.experimental b/patches/series.experimental
index 6c1928d..fe59680 100644
--- a/patches/series.experimental
+++ b/patches/series.experimental
@@ -11,3 +11,4 @@
 openstack/cinder/sep-sp-iscsi.patch
 openstack/cinderlib/storpool-test-20190910.patch
 openstack/devstack/eatmydata.patch
+openstack/os-brick/attach-globalid.patch