Added a script for generating a number of flows.

Currently, some of the parameters fo the flows are hard-coded,
and all flows are between same source and destination DPID and ports
(differentiated by different matchSrcMac and matchDstMac).

The output of the script should be saved to a file, and the flows from
that file should be added by the following command:
  web/add_flow.py -f filename
1 file changed