Support policy-in-code and deprecated policy

This change adds support for policy-in-code and deprecated policy
following the change in horizon.

Depends-on: https://review.opendev.org/750134
Change-Id: I408af56e6a54b135d38a486101b4bb3108d4f0d5

devstack/plugin.sh

@@ -28,6 +28,8 @@ if is_service_enabled horizon && is_service_enabled manila && is_service_enabled
         echo_summary "Configuring Manila UI"
         cp -a ${MANILA_UI_DIR}/manila_ui/local/enabled/* ${DEST}/horizon/openstack_dashboard/local/enabled/
         cp -a ${MANILA_UI_DIR}/manila_ui/local/local_settings.d/* ${DEST}/horizon/openstack_dashboard/local/local_settings.d/
+        cp -a ${MANILA_UI_DIR}/manila_ui/conf/manila_policy.yaml ${DEST}/horizon/openstack_dashboard/conf/
+        cp -a ${MANILA_UI_DIR}/manila_ui/conf/default_policies/manila.yaml ${DEST}/horizon/openstack_dashboard/conf/default_policies/
     elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
         # no-op
         :

manila_ui/local/local_settings.d/_90_manila_shares.py

@@ -15,7 +15,11 @@ from django.conf import settings
 
 
 settings.POLICY_FILES.update({
-    'share': 'manila_policy.json',
+    'share': 'manila_policy.yaml',
+})
+
+settings.DEFAULT_POLICY_FILES.update({
+    'share': 'default_policies/manila.yaml'
 })
 
 # Sample

releasenotes/notes/policy-in-code-support-23744e26a7f6e284.yaml

@@ -0,0 +1,7 @@
+---
+upgrade:
+  - |
+    The default configuration file has been updated and now includes
+    the required parameters to use the new policy-in-code feature in Horizon.
+    Please refer to the release note and documentation of Horizon to find
+    details about this feature.