t2200-job-ingest: fix badowner and badrole tests

The tests for submission with bad signature and bad role in the
job ingest checks were checking for the wrong strings in the
error output. Add the actual expected strings in the check to
avoid these false failures.

t/t2200-job-ingest.t

@@ -81,13 +81,13 @@ test_expect_success 'job-ingest: submit job 100 times, reuse signature' '
 test_expect_success HAVE_FLUX_SECURITY 'job-ingest: submit user != signed user fails' '
 	! FLUX_HANDLE_USERID=9999 ${SUBMITBENCH} \
 	     ${JOBSPEC}/valid/basic.yaml 2>baduser.out &&
-	grep -q permitted baduser.out
+	grep -q "signer=$(id -u) != requestor=9999" baduser.out
 '
 
 test_expect_success HAVE_FLUX_SECURITY 'job-ingest: non-owner mech=none fails' '
 	! FLUX_HANDLE_ROLEMASK=0x2 ${SUBMITBENCH} \
 	     ${JOBSPEC}/valid/basic.yaml 2>badrole.out &&
-	grep -q permitted badrole.out
+	grep -q "only instance owner" badrole.out
 '
 
 test_done