patch from Nathan Yee to make test not work on bluegene

testsuite/expect/test12.3

@@ -47,6 +47,14 @@ set test_acct	"slurm_test-account.1"
 
 print_header $test_id
 
+#
+# Checks if test is running on blue gene.
+#
+if {[test_bluegene]} {
+	send_user "\nWARNING: This test can't be run on a blue gene\n"
+	exit $exit_code
+}
+
 #
 # Check accounting config and bail if not found.
 #