Add MySQL client class independent of OpenStack

This change provides a bare-bone MySQL client which doesn't create any
of the OpenStack databases. This is useful when deploying Galera/MySQL
in a non-OpenStack context.

Change-Id: I0932d9a7520d998fd259821f5b5e7113cb3a9ced
diff --git a/mysql/client/init.yml b/mysql/client/init.yml
new file mode 100644
index 0000000..4cea41a
--- /dev/null
+++ b/mysql/client/init.yml
@@ -0,0 +1,14 @@
+parameters:
+  _param:
+    mysql_client_host: localhost
+  mysql:
+    client:
+      enabled: true
+      server:
+        database:
+          admin:
+            host: ${_param:mysql_client_host}
+            port: 3306
+            user: ${_param:mysql_admin_user}
+            password: ${_param:mysql_admin_password}
+            encoding: utf8