Fix indentation issue

Change Icde6c61a0b26741946d079b2b00475de34722bea introduced a couple of
indentation mistakes.

Change-Id: I47756939fd933788b85bbd141d3c3bd870445efa
Closes-Bug: #1803949

docker/services/database/mongodb.yaml

@@ -135,7 +135,7 @@ outputs:
           volumes:
             list_concat:
               - - /var/lib/mongodb:/var/lib/mongodb:z
-              - /var/log/containers/mongodb:/var/log/mongodb:z
+                - /var/log/containers/mongodb:/var/log/mongodb:z
               - if:
                 - internal_tls_enabled
                 - - list_join:

docker/services/ovn-metadata.yaml

@@ -172,7 +172,7 @@ outputs:
               list_concat:
                 - {get_attr: [ContainersCommon, docker_puppet_apply_volumes]}
                 - - /lib/modules:/lib/modules:ro
-                - /run/openvswitch:/run/openvswitch:shared,z
+                  - /run/openvswitch:/run/openvswitch:shared,z
           ovn_metadata_agent:
             start_order: 1
             image: {get_param: DockerOvnMetadataImage}