Enable {priority,runtime}ClassName for Heat

Change-Id: I7fddd077d66dc365cd923506998ce6beeb405040
(cherry picked from commit 4189c2b89e8c6fb75dfb17c9b8742236eb64d6c2)
diff --git a/charts/heat/values.yaml b/charts/heat/values.yaml
index 1cf8bdc..af99c49 100644
--- a/charts/heat/values.yaml
+++ b/charts/heat/values.yaml
@@ -1015,6 +1015,24 @@
         default: 80
 
 pod:
+  priorityClassName:
+    heat_api: null
+    heat_cfn: null
+    heat_cloudwatch: null
+    heat_tests: null
+    heat_engine_cleaner: null
+    heat_purge_deleted: null
+    heat_engine: null
+    db_sync: null
+  runtimeClassName:
+    heat_api: null
+    heat_cfn: null
+    heat_cloudwatch: null
+    heat_tests: null
+    heat_engine_cleaner: null
+    heat_purge_deleted: null
+    heat_engine: null
+    db_sync: null
   security_context:
     heat:
       pod: