Manually set healthchecks for _cron services

The docker _cron services show up as (unhealthy) due to
them sharing the containers for the OpenStack services.
As such we need to manually override the health checks
for these services. By setting them to /bin/true
the services should show up has healthy.

Change-Id: I46e12bcec226fbe2768c7fe8f0e7719df46401a9
Closes-bug: #1713183

docker/services/cinder-api.yaml

@@ -163,6 +163,8 @@ outputs:
             user: root
             privileged: false
             restart: always
+            healthcheck:
+              test: /bin/true
             volumes:
               list_concat:
                 - {get_attr: [ContainersCommon, volumes]}

docker/services/heat-api.yaml

@@ -136,6 +136,8 @@ outputs:
             user: root
             privileged: false
             restart: always
+            healthcheck:
+              test: /bin/true
             volumes:
               list_concat:
                 - {get_attr: [ContainersCommon, volumes]}

docker/services/keystone.yaml

@@ -175,6 +175,8 @@ outputs:
             privileged: false
             restart: always
             command: ['/bin/bash', '-c', '/usr/local/bin/kolla_set_configs && /usr/sbin/crond -n']
+            healthcheck:
+              test: /bin/true
             volumes:
               list_concat:
                 - {get_attr: [ContainersCommon, volumes]}

docker/services/nova-api.yaml

@@ -196,6 +196,8 @@ outputs:
             user: root
             privileged: false
             restart: always
+            healthcheck:
+              test: /bin/true
             volumes:
               list_concat:
                 - {get_attr: [ContainersCommon, volumes]}