Remove httpd log dir for glance-api

Glance API still runs eventlet, the
/var/log/containers/httpd/glance-api directory on the host serves no
purpose and confuses users. Remove it.

Change-Id: Idcd26571d20f02b723af9938ba625c9fa548c0d7
Closes-Bug: #1728562

docker/services/logging/files/glance-api.yaml

@@ -16,7 +16,6 @@ outputs:
     description: The volumes needed to log to files in the host.
     value: &glance_api_volumes
       - /var/log/containers/glance:/var/log/glance
-      - /var/log/containers/httpd/glance-api:/var/log/httpd
   docker_config:
     description: Extra containers needed for logging to files in the host.
     value:
@@ -37,11 +36,10 @@ outputs:
           state: directory
         with_items:
           - /var/log/containers/glance
-          - /var/log/containers/httpd/glance-api
       - name: glance logs readme
         copy:
           dest: /var/log/glance/readme.txt
           content: |
             Log files from glance containers can be found under
-            /var/log/containers/glance and /var/log/containers/httpd/glance-api.
+            /var/log/containers/glance.
         ignore_errors: true