Merge pull request #333 from edx/jarv/fix-pymongo-bug

adding pymongo lib needed for ansible module

playbooks/roles/edxlocal/tasks/main.yml

@@ -14,6 +14,9 @@
 - name: edxlocal| install packages needed for single server 
   apt: pkg={{','.join(edxlocal_debian_pkgs)}} install_recommends=yes state=present
 
+- name: edxlocal | install python pymongo for mongo_user ansible module
+  pip: name=pymongo state=present version=2.6.3
+
 - name: edxlocal | create a database for edxapp
   mysql_db: >
     db=edxapp