vdsm: Move all files for the VDSM module to a separate folder

Change-Id: Ie10ec32a7bc12fd2d8d8307da7c1b5664c266271
Signed-off-by: Vinzenz Feenstra <vfeenstr@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/11858
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Reviewed-by: Federico Simoncelli <fsimonce@redhat.com>