Enable cloudkitty ui when enable_cloudkitty is yes

Change-Id: If4a9e1db02e89362b01181149327983fc1c556f2
Depends-On: I6bb33de6d19ba42710e6d4138059c23076b759ec
Closes-Bug: #1641053

ansible/roles/horizon/tasks/start.yml

@@ -6,6 +6,7 @@
     image: "{{ horizon_image_full }}"
     name: "horizon"
     environment:
+      ENABLE_CLOUDKITTY: "{{ 'yes' if enable_cloudkitty | bool else 'no' }}"
       ENABLE_IRONIC: "{{ 'yes' if enable_ironic | bool else 'no' }}"
       ENABLE_MANILA: "{{ 'yes' if  enable_manila | bool else 'no' }}"
       ENABLE_NEUTRON_LBAAS: "{{ 'yes' if  enable_neutron_lbaas | bool else 'no' }}"