keycloak: migrate to Quarkus distribution

roles/keycloak/tasks/main.yml

@@ -39,6 +39,9 @@
 
     - name: start and enable keycloak
       service: name=keycloak enabled=yes daemon_reload=yes state=started
+
+    - name: wait for keycloak to initialize
+      wait_for: port={{ keycloak_port }}
   always:
     - name: remove admin credentials once keycloak is running
       file: path=/etc/keycloak/admin-user.conf state=absent