Add DPxx also to the eamxx v1 medres suite

Author: bartgol

cime_config/tests.py

@@ -747,6 +747,10 @@
     },
 
     "e3sm_eamxx_v1_medres" : {
+        "inherit" : (
+            # DPxx is (very) lowres, but we only run medres nightly, so add it here
+            "e3sm_eamxx_v1_dp-eamxx",
+        ),
         "time"  : "02:00:00",
         "tests" : (
             #  "SMS_D_Ln2.ne30_ne30.F2000-SCREAMv1-AQP1", # Uncomment once IC file for ne30 is ready