remove pmloglib.Context in js service

:Release Notes:
remove pmloglib.Context in js service

:Detailed Notes:
- Pmloglib.Conext is retired. Replace it to "console.log"

:Testing Performed:
1. Install com.example.js.service to target
2. Call js service's method
   luna-send -n 1 -f luna://com.example.service.js/locale '{}'
3. Check the service's log
   journalctl | grep com.example.service.js
  > [com.example.service.js] LOCALE_CALLBACK : get locale response

:QA Notes:

:Issues Addressed:
[PLAT-116182] [webOS OSE] No response from Call JS service's method
              by passing luna-send command

Change-Id: I4c153761293e53e6b543e658d70a796140baa6e2
Reviewed-on: http://gpro.lge.com/c/webosose/samples/+/281892
Tested-by: Youngeun Kim <ye0607.kim@lge.com>
Reviewed-by: Youngeun Kim <ye0607.kim@lge.com>
Reviewed-by: Jaeduck Oh <nicky.oh@lge.com>

Author: nickyzero

js-services/com.example.service.js/com_example_service_js.js

@@ -15,8 +15,6 @@
 // SPDX-License-Identifier: Apache-2.0
 
 var Service = require('webos-service');
-var pmloglib = require('pmloglib');
-var context = new pmloglib.Context("exampleJSService");
 
 // Register com.example.service.js
 var service = new Service("com.example.service.js");
@@ -31,7 +29,7 @@ service.register("hello", function(message) {
 // Call another service
 service.register("locale", function(message) {
     service.call("luna://com.webos.settingsservice/getSystemSettings", {"key":"localeInfo"}, function(m2) {
-        context.log(pmloglib.LOG_INFO, "LOCALE_CALLBACK", {"SERVICE_NAME": "exampleJSService"}, "get locale response");
+        console.log("[com.example.service.js]", "LOCALE_CALLBACK : get locale response");
         var response = "You appear to have your locale set to: " + m2.payload.settings.localeInfo.locales.UI;
         message.respond({
             message: response