Breaking down the test fixtures into reusable parts

    * VNC console and Change Password
    * Actions test cases de-composited in order to be reusable by boot from volume tests
    * Fixed PEP8 issues
    * Renaming Plugin to Base Fixture after Daryl review
    * Fixed naming of the resize down confirm abse fixture
    * Chris triple inheritance proposal implemented

Change-Id: I9681db8477d6a5853f0c21e31f7c8a10a0ac6bc2
Merge "Breaking down the test fixtures into reusable parts"