salt/master: install gitpython

salt/master.sls

@@ -9,6 +9,10 @@ salt-master:
     - watch:
       - file: /etc/salt/master.d
 
+gitpython:
+  pip.installed:
+    - name: gitpython
+
 /etc/salt/master.d:
   file.recurse:
     - source: salt://salt/files/master.d