ubik recovery kill duplicate code

ubik recovery kill duplicate code

if recovery wants to invalidate transaction unconditionally and
has code duplication from urecovery_checkTid, just make checkTid
do what we want

Change-Id: I345560c496d4cb4506de6db79357b99c616ffbbe
Reviewed-on: http://gerrit.openafs.org/2628
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>