Brought jenkins and mininet scripts into git repo.
Scripts automatically deployed to jenkins and to mininet for test
execution.
Added mininet/custom topologies.  These get deployed onto mininet
server.
Modified runner.py to execute flows based on
https://trello.com/c/vCfk3w3O/5-5-h1-h2-h3-client-group-vlan-1-h4-h5-h6-server-group-vlan2-create-vlan-change-workflow-3-switches

Change-Id: I977eb1f5074482ec1c895942c1ba3da94086c208