fix test for cray systems

testsuite/expect/test1.23

@@ -173,6 +173,11 @@ expect {
 		set this_date $expect_out(1,string)
 		exp_continue
 	}
+	#needed for cray systems that don't have a prefix
+	-re "($alpha_numeric_under)" {
+		set this_date $expect_out(1,string)
+		exp_continue
+	}
 	timeout {
 		send_user "\nFAILURE: srun not responding\n"
 		slow_kill $srun_pid