KCM: Return a valid tevent error code if a request cannot be created
Previously we were returning whatever was in 'ret' which is wrong,
typically it would have been EOK as returned from a previous successfull
call or even an uninitialized value.
Reviewed-by: Michal Židek <email@example.com>
Reviewed-by: Simo Sorce <firstname.lastname@example.org>