Change delay before policy is created

Delay was based on a pause which was goofy, new model is based on that used
by os_keystone role and waits for the lb to respond appropriately.

tasks/gnocchi_policy_setup.yml

@@ -19,8 +19,12 @@
     - gnocchi-setup
     - gnocchi-policy-setup
 
-- name: Wait for Gnocchi API service to be available
-  pause: seconds=10
+- name: Wait for keystone admin to come up
+  wait_for:
+    host: "{{ internal_lb_vip_address }}"
+    port: "{{ gnocchi_service_port }}"
+    timeout: 25
+    delay: 10
   run_once: true
   tags:
     - gnocchi-setup