Support verbose output for testrunner
Support verbose output for testrunner

The option parsing logic has changed without affecting the test
invocation commandline interface.
So, it should be possible to invoke tests like this:

  python tests/runtests.py -u #only run unit tests
  python tests/runtests.py -m #only run module tests
  python tests/runtests.py #run all tests
  python tests/runtests.py -v #run all tests with verbose output
  python tests/runtests.py -vu #run unit tests with verbose output

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt