Fix some of the erroring out test cases

There are a couple new test cases that are now erroring out.

- A usage of the non helper unit testcase base which is trigging
  and error on python 2.6 due to lack of method, fix this by using
  the base helper class.
- A freebsd distro test check thats looking for /etc/resolv.conf and
  examining its contents, which won't exist due to our mocking routine
  that does not allow that file to be read.
- A freebsd distro test where the distro class tries to call into 
  ['ifconfig', '-a'] for a set of values, those values don't exist on
  the machine I am running on (and likely others machines) so we should
  mock the subp function out (that the distro class calls) and correctly
  return values that will work for the testcase.

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