Release openstack-doc-tools 1.2.1

This contains a collection of bugs, most noticeable a bug in
doc-tools-check-languages that was exposed by tox 2.5.0 (released
2016-11-16).

Change-Id: I45e950eb05754fc655d1a8b1e1b95002467d057c

deliverables/_independent/openstack-doc-tools.yaml

@@ -65,3 +65,7 @@ releases:
     projects:
       - repo: openstack/openstack-doc-tools
         hash: 01f284ae05ace852edfbd7a490a75fa37bdd19a5
+  - version: 1.2.1
+    projects:
+      - repo: openstack/openstack-doc-tools
+        hash: 5d48d9738bcdc3626864922a931c5ba1ab0e7db1