Add Toast Notification to ServerLED page

- Added Toast notification when Server LED turning On/Off.

Signed-off-by: Suren Neware <sneware9@in.ibm.com>
Change-Id: I8dda963275f7083ae5c8804831c1bb676d7bbcc4
diff --git a/src/locales/en-US.json b/src/locales/en-US.json
index 8b80233..f239058 100644
--- a/src/locales/en-US.json
+++ b/src/locales/en-US.json
@@ -390,7 +390,13 @@
   },
   "pageServerLed": {
     "serverLedSubTitle": "Server indicator LED",
-    "serverLedTitle": "LED light control"
+    "serverLedTitle": "LED light control",
+    "toast": {
+      "errorServerLedOff": "Error turning LED off.",
+      "errorServerLedOn": "Error turning LED on.",
+      "successServerLedOff": "Server LED successfully turned off.",
+      "successServerLedOn": "Server LED successfully turned on."
+    }
   },
   "pageServerPowerOperations": {
     "currentStatus": "Current status",