Update name of file of exported log files

- The name of exported event log file would be combination of event logs
  prefix and current date and time.

Signed-off-by: Suren Neware <sneware9@in.ibm.com>
Change-Id: Iaaf46fed5df1942e9cc2e4157dafa8e3e755ecf8
diff --git a/src/locales/en-US.json b/src/locales/en-US.json
index 2d69a7b..85e2a3a 100644
--- a/src/locales/en-US.json
+++ b/src/locales/en-US.json
@@ -161,6 +161,7 @@
     }
   },
   "pageEventLogs": {
+    "exportFilePrefix": "event_logs_",
     "modal": {
       "deleteTitle": "Delete log | Delete logs",
       "deleteMessage": "Are you sure you want to delete %{count} log? This action cannot be undone. | Are you sure you want to delete %{count} logs? This action cannot be undone."