Fix test_cime_case_test_walltime_mgmt_8

Theta machine is no longer known to E3SM.

CIME/tests/test_sys_cime_case.py

@@ -509,8 +509,10 @@ def test_cime_case_test_walltime_mgmt_8(self):
         if self._config.test_mode == "cesm":
             self.skipTest("Skipping walltime test. Depends on E3SM batch settings")
 
-        test_name = "SMS_P25600.f19_g16_rx1.A"
-        machine, compiler = "theta", "gnu"
+        # Frontier has 56 MAX_MPITASKS_PER_NODE so 5600 should require 100 nodes
+        # which should land us in 6 hour queue
+        test_name = "SMS_P5600.f19_g16_rx1.A"
+        machine, compiler = "frontier", "gnu"
         casedir = self._create_test(
             [
                 "--no-setup",
@@ -528,12 +530,12 @@ def test_cime_case_test_walltime_mgmt_8(self):
             "./xmlquery JOB_WALLCLOCK_TIME -N --subgroup=case.test --value",
             from_dir=casedir,
         )
-        self.assertEqual(result, "09:00:00")
+        self.assertEqual(result, "06:00:00")
 
         result = self.run_cmd_assert_result(
             "./xmlquery JOB_QUEUE -N --subgroup=case.test --value", from_dir=casedir
         )
-        self.assertEqual(result, "default")
+        self.assertEqual(result, "batch")
 
     def test_cime_case_test_custom_project(self):
         test_name = "ERS_P1.f19_g16_rx1.A"