Tobiko has always used Ubuntu images as advanced guest images to create
VM instances during its tests.
This patch replaces the Ubuntu image with a Fedora image that is
customized to work with Tobiko tests properly.
The different files, config parameters, classes and attributes are
renamed to use the generic "advanced_vm" and "Advanced" prefixes to make
it easier in case another change of guest images is done in the future.
Depends-On: I6015af347dba6b8a587fa3b3811ca4c8cdd41b7a
Change-Id: Ie4ed523eb9646b6e79553341500c2e3314af8c3d
7b67ccba2e