Fix winrepo support

Change-Id: Iee0165a071ed29fd1ffc63b88edf687247c396d4

salt/master/win_repo.sls

@@ -16,7 +16,7 @@ include:
 {{ master.win_repo.address }}:
   git.latest:
   - target: /srv/salt/win/repo-ng
-  - rev: {{ master.windows_repo.get('revision', 'master') }}
+  - rev: {{ master.win_repo.get('revision', 'master') }}
   - require:
     - file: /srv/salt/win
     - pkg: git_packages