Adding mock-detached util function and cleaning up util help output

- mock-detached will add or remove firewall rules to block
  traffic that would pull resources from the internet durning a deploy
  These firewall rule may need to be added to, just starting with
  http and https traffic figuring that would block the majority of cases.

- making updates to util help message according to:
  https://en.wikipedia.org/wiki/Usage_message

Change-Id: I3c90999f977dd8f49c48399d312ed128b37bea6d
Signed-off-by: Dan Radez <dradez@redhat.com>

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