Add manila policies support to horizon plugin

Change-Id: I83c6d9cbb6b716d41ef34b947be9359dfaecce3d
diff --git a/horizon/server/plugin/manila.yml b/horizon/server/plugin/manila.yml
index 53ad9b6..ec00da6 100644
--- a/horizon/server/plugin/manila.yml
+++ b/horizon/server/plugin/manila.yml
@@ -6,3 +6,12 @@
           source:
             engine: pkg
             name: python-manila-ui
+      policy:
+        share:
+          source: file
+          name: manila_policy.json
+          enabled: true
+        sharev2:
+          source: file
+          name: manila_policy.json
+          enabled: true