Introducing 'ovs-bugtool-ovs-ofctl-loop-over-bridges' bash script.
It calls ovs-ofctl commands given as first parameter for each
bridge with the corresponding open flow protocol option.
Usage:
ovs-bugtool-ovs-ofctl-loop-over-bridges "param1" "param2"
 - param1: ovs-ofctl command to call (show, dump-flows, etc...)
 - param2: optional, add further parts for the shell command
   (like "| grep something")

Calling ovs-ofctl commands 'show' and 'dump-flows' with the
'ovs-bugtool-ovs-ofctl-loop-over-bridges' bash script.

Signed-off-by: David Patrik Pinter <david.patrik.pinter@ericsson.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>