Daemon dns, group, ip, iptable, bridge etc

based on https://github.com/autotest/autotest-docker/pull/256
Solution 2 is correct, feel free to hard code the 'CLI' interface into the test if you like.  We don't need to worry about testing anything other than the CLI + socket at this time.  Our directive is to hit all the simple cases first, especially until the rate of docker CLI behavior changes slows WAY down.  Right now it's changing so frequently, any higher-level more complicated tests would constantly require maintenance just to keep pace.  However, this isn't *lost* work either, we just need to pause it until the more immediate simple-test requirements are taken care of.