[3/3] Use fixed getVlanDevice() and getVlanID().

Change many functions to use getVlanDevice() and getVlanID() as a
split('.') replacement.

Change-Id: I9af01e25e1257c18e6b17c4c3c5cb74dc535947a
Signed-off-by: Amador Pahim <apahim@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/18182
Reviewed-by: Antoni Segura Puimedon <asegurap@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>