Docker: Revision 0.3.2 Updates (no interface changes)

*  Cleaned up some minor pylint problems

*  Added an 's' on the end of images_unittest.py

*  Added simple unittests script to execute them
   all in parallel.

*  Updated documentation to include subtest.SubSubtestCaller
   class.  It was mistakenly not added previously.

*  Added minimal networking module with ContainerPort class.
   Follows very closely to the same pattern as images module.

*  Added minimal containers module also mirroring closely
   with the images pattern.  However there are quite a few
   more container attributes, only some are needed for
   creation, the rest are simply stuck onto the class.

*  Added missing __init__ method to DockerImagesCLI and
   DockerContainersCLI to fill in default params.

*  Added standard autotest test exceptions to xceptions module.
   This makes it easier for tests (they don't need to import
   big-long autotest module).  It also allows us to see the
   different between a test-raised exception and harness-raised.

*  Extended DockerImagesCLI and DockerContainersCLI
   interface by turning docker_cmd() into a public method.
   This allows the possibility for tests to perform checks or
   modifications when the command being used is the subject
   of a test.  Changed the timeout parameter to be non-defaulting.
   Callers may override this behavior if needed.

*  Extended CLI interfaces for images and containers with
   new name 'clic'.  This is for when the image or ps command
   is the test subject and therefor output checkers need to
   run against it's output.

*  Added annother output module 'checker' to watch for an
   'error: ' string in output.  Updated all negative subtests
   to properly invert the checker results.

*  Updated build subtest to log a message when postprocess
   failed to remove the built image.

*  Added output_check method and override to pull tests.
   Updated negative subsubtest 'wrong_registry_addr' to properly
   fail on SUCCESSFUL checks (error-check now catches here)

*  Updated run subtest to use utils.signal_pid() which has some
   extra testing-related checks involved.

*  Added additional verbosity to check in version subtest.

Signed-off-by: Chris Evich <cevich@redhat.com>
Docker: Add test for 'ps -a' subcommand

Signed-off-by: Chris Evich <cevich@redhat.com>
docker: adds docker commit repo_tag test.

Signed-off-by: Jiří Župka <jzupka@redhat.com>
docker: fix images for parsing <none>:<none> name of image.

Signed-off-by: Jiří Župka <jzupka@redhat.com>
Merge pull request #1 from cevich/docker_containers

Docker: Revision 0.3.2 Updates (no interface changes)
-and-
Commit test and fixs image re pattern. #5