Fix doc for service list

If a service is enabled, the "disabled_reason" field in response
for /v2/.{tenant_id}./os-services/detail is null, however, currently
it's specified as "" in the doc, thus may be confusing to users.

This patch change the template and doc, it should not cause issue to
existing applications.

Change-Id: Ia71ec4c97a355bcc1a7b63e6107db77f80a5d843
Close-bug: 1328382
Imported Translations from Transifex

Change-Id: I43633b01e6a9b93b4d291f2bc900ea9851469921
Updated from global requirements

Change-Id: I4884005a65e9992447587588bac89b85b087bc4a
VMware: update file permissions and mode

Commit 17c5f92b6ab552f1ac21f8ce332053e35d1de919 set the wrong
file permissions and mode.

Change-Id: Iffcd2961161cc6380bb434628183fe7162cf6e8a
Merge "Updated from global requirements"
Merge "VMware: update file permissions and mode"
Merge "Imported Translations from Transifex"
Merge "Fix doc for service list"