Fix for invalid variable name in test

testsuite/expect/test1.74

@@ -77,7 +77,7 @@ expect {
 }
 
 proc cleanup { } {
-	global acct acct_c1 acct_c2 qos
+	global acct acct_c1 acct_c2 exit_code qos
 	remove_acct "" "$acct,$acct_c1,$acct_c2"
 	if {[remove_qos "$qos"] != 0} {
 		send_user "\nWARNING: not authorized to perform this test\n"
@@ -155,6 +155,7 @@ proc add_child {parent child maxnode grpnode} {
 cleanup
 
 # Setup
+set partition [default_partition]
 set node_cnt [available_nodes $partition "idle,alloc,comp"]
 if {$node_cnt < 3} {
 	send_user "\nWARNING: partition $partition has too few nodes ($node_cnt < 3)\n"