smbtorture: rename CHECK_VALUE() to CHECK_VAL() in smb2/compound.c

smbtorture: rename CHECK_VALUE() to CHECK_VAL() in smb2/compound.c

Prepares for using macros from lease_break_handler.h which makes use of
CHECK_VAL() while relying on a definition of CHECK_VAL() in the .c file.

While at it, add a goto done which is always a good thing to get clear failures
from tests.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15697

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit 4932b433ff2f1c4e603073624a5d22140acfb2ed)