add sunbird-js-utils as submodule to sunbird-content-service

.gitmodules

+[submodule "sunbird-js-utils"]
+	path = sunbird-js-utils
+	url = https://github.com/project-sunbird/sunbird-js-utils.git

package.json

@@ -5,9 +5,9 @@
   "main": "app.js",
   "scripts": {
     "test": "karma start karma.conf.js",
-    "preinstall": "npm install ./../../js-utils/sb-config-util && npm install ./../../js-utils/sb-http-util && npm install ./../../js-utils/sb-ekstep-util && npm install ./../../js-utils/sb_logger_util && npm install ./../../js-utils/sb_req_validator_util && npm install ./../../js-utils/response_util"
+    "preinstall": "npm install ./sunbird-js-utils/sb-config-util && npm install ./sunbird-js-utils/sb-http-util && npm install ./sunbird-js-utils/sb-ekstep-util && npm install ./sunbird-js-utils/sb_logger_util && npm install ./sunbird-js-utils/sb_req_validator_util && npm install ./sunbird-js-utils/response_util"
   },
-  "author": "Harish Kumar Gangula",
+  "author": "EkStep",
   "license": "ISC",
   "dependencies": {
     "async": "^2.4.0",

sunbird-js-utils @ 5981e54d

+Subproject commit 5981e54dd69b79e0557b2a12087f1998210d49b3