cinderlib: fix the StorPool template name.

In the new StorPool CI cluster, the template name is not "hybrid" any
more.

Change-Id: Id972bda8f7ba50c317d55aec2441cdf2213e3824
diff --git a/patches/openstack/cinderlib/storpool-test-20190910.patch b/patches/openstack/cinderlib/storpool-test-20190910.patch
index 7267d36..f5db0c9 100644
--- a/patches/openstack/cinderlib/storpool-test-20190910.patch
+++ b/patches/openstack/cinderlib/storpool-test-20190910.patch
@@ -19,7 +19,7 @@
 +backends:
 +    - volume_backend_name: storpool
 +      volume_driver: cinder.volume.drivers.storpool.StorPoolDriver
-+      storpool_template: hybrid
++      storpool_template: virtual
 +      enable_unsupported_driver: true
 -- 
 2.23.0