Change design to remove cache file as it did not work.

- Remove cache file functionality and just look for the current ip
  in iptables
- Fix up some bad logic I put in quick when deleting tables
- runCommand now looks to see if command can be found in path

Still needs a little work but it is better for a quick script.

Change-Id: I49b5ce0a0fd21b5c3dd0b766bf3d1ef2aae110fd