led: Fix for Chassis IndicatorLED patch response

While Patching Chassis Indicator LED from Redfish, response is showing
as empty but HTTPS status code is "200 OK" on successful case.
So provided fix for Proper response on Success.

Tested:
1. Verified RedFish validator passed
2. Verified the response on Redfish by updating IndicatorLED status.
PATCH: https://<BMC-IP>/redfish/v1/Chassis/<Baseboard-ID>
Body:
{
	"IndicatorLED": "Blinking"
}
Response:
{
    "@Message.ExtendedInfo": [
        {
            "@odata.type": "#Message.v1_1_1.Message",
            "Message": "Successfully Completed Request",
            "MessageArgs": [],
            "MessageId": "Base.1.8.1.Success",
            "MessageSeverity": "OK",
            "Resolution": "None"
        }
    ]
}

Signed-off-by: Jayaprakash Mutyala <mutyalax.jayaprakash@intel.com>
Change-Id: I2e1281e6c06c445fe8d0c350bb74ea18f3461a35
diff --git a/redfish-core/lib/led.hpp b/redfish-core/lib/led.hpp
index 0fd1c9b..c003d22 100644
--- a/redfish-core/lib/led.hpp
+++ b/redfish-core/lib/led.hpp
@@ -141,6 +141,7 @@
                         messages::internalError(aResp->res);
                         return;
                     }
+                    messages::success(aResp->res);
                 },
                 "xyz.openbmc_project.LED.GroupManager",
                 "/xyz/openbmc_project/led/groups/enclosure_identify",