Delegate gnocchi retrievement task to setup host

Since we don't have required libraries on the swift hosts,
we should delegate openstack collection tasks to the setup host.

Change-Id: Ib8a8875c1a355b1f67cdc2bc4f1d028fa7ae3496

tasks/swift_proxy_hosts.yml

@@ -13,6 +13,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+- name: Define Gnocchi project id
+  delegate_to: "{{ swift_service_setup_host }}"
+  vars:
+    ansible_python_interpreter: "{{ swift_service_setup_host_python_interpreter }}"
+  block:
     - name: Get Gnocchi project id
       openstack.cloud.os_project_info:
         name: "{{ gnocchi_service_project_name }}"
@@ -22,8 +27,6 @@
       until: get_gnocchi_project is success
       retries: 5
       delay: 10
-  when:
-    - swift_gnocchi_enabled | bool
       no_log: True
 
     - name: Store Gnocchi project id
@@ -31,7 +34,6 @@
         swift_gnocchi_service_project_id: "{{ get_gnocchi_project.openstack_projects[0].id }}"
   when:
     - swift_gnocchi_enabled | bool
-    - get_gnocchi_project is success
 
 - name: swift proxy server configuration
   config_template: