Fix docker run script
Fix docker run script

Though this is not a problem in our case, the parameter parsing had a
bug in it.
when parsing the command line arguments, we did not "eat" the '--'
argument, thus if we were to run a script with the leftover arguments,
it would get that argument first and stop parsing.

Change-Id: Ia863e5cfc6a3fe6a31e32f034e282bda0534fd91

openstack/dragonflow,openstack/dragonflow,openstack/dragonflow