Initial manila support

This patch adds the following:

 * Apache manila sites
 * mysql database
 * horizon plugin
 * keystone endpoints/users
 * manila system cluster/single
 * nginx proxy site
 * haproxy proxy site

Related-Prod: PROD-18003

Change-Id: I8892e7ad32d1d1d8adb487a94f669593aab15977
diff --git a/horizon/server/plugin/manila.yml b/horizon/server/plugin/manila.yml
new file mode 100644
index 0000000..53ad9b6
--- /dev/null
+++ b/horizon/server/plugin/manila.yml
@@ -0,0 +1,8 @@
+parameters:
+  horizon:
+    server:
+      plugin:
+        manila:
+          source:
+            engine: pkg
+            name: python-manila-ui