fixing OperatorPrivilegesIT

Author: masseyke

x-pack/plugin/security/qa/operator-privileges-tests/src/javaRestTest/java/org/elasticsearch/xpack/security/operator/Constants.java

@@ -609,6 +609,8 @@ public class Constants {
         "indices:data/write/reindex",
         "indices:data/write/update",
         "indices:data/write/update/byquery",
+        "indices:monitor/data_stream/mappings/get",
+        "indices:monitor/data_stream/mappings/update",
         "indices:monitor/data_stream/settings/get",
         "indices:monitor/data_stream/settings/update",
         "indices:monitor/data_stream/stats",