tests: Kill kdc harder when failing

tests/gss/check-basic.in

@@ -94,10 +94,10 @@ echo "Doing database check"
 ${kadmin} check ${R} || exit 1
 
 echo Starting kdc
-${kdc} --testing --detach || { echo "kdc failed to start"; cat messages.log; exit 1; }
+${kdc} --detach --testing || { echo "kdc failed to start"; cat messages.log; exit 1; }
 kdcpid=`getpid kdc`
 
-trap "kill ${kdcpid}; echo signal killing kdc; exit 1;" EXIT
+trap "kill -9 ${kdcpid}; echo signal killing kdc; exit 1;" EXIT
 
 exitcode=0