[2930] Use a constant

src/lib/cc/proto_defs.cc

@@ -52,6 +52,7 @@ const int CC_REPLY_SUCCESS = 0;
 const char *const CC_PAYLOAD_LNAME = "lname";
 const char *const CC_PAYLOAD_RESULT = "result";
 const char *const CC_PAYLOAD_COMMAND = "command";
+const char *const CC_PAYLOAD_NOTIFICATION = "notification";
 
 }
 }

src/lib/config/ccsession.cc

@@ -894,7 +894,7 @@ ModuleCCSession::notify(const std::string &group, const std::string &name,
     if (params) {
         notification->add(params);
     }
-    message->set("notification", notification);
+    message->set(isc::cc::CC_PAYLOAD_NOTIFICATION, notification);
     groupSendMsg(message, isc::cc::CC_GROUP_NOTIFICATION_PREFIX + group,
                  isc::cc::CC_INSTANCE_WILDCARD,
                  isc::cc::CC_TO_WILDCARD, false);

src/lib/python/isc/config/ccsession.py

@@ -554,7 +554,7 @@ class ModuleCCSession(ConfigData):
         notification = [event_name]
         if params is not None:
             notification.append(params)
-        self._session.group_sendmsg({'notification': notification},
+        self._session.group_sendmsg({CC_PAYLOAD_NOTIFICATION: notification},
                                     CC_GROUP_NOTIFICATION_PREFIX +
                                     notification_group,
                                     instance=CC_INSTANCE_WILDCARD,