GUI: Added ESLint to gulp tasks
GUI: Linted files
Fixed an error in the build script

JIRA-TASKS: ONOS-6522, ONOS-6521

Change-Id: Ie72abfe6cbe21c8946f219be6193344b67ec6dd1
diff --git a/web/gui/src/main/webapp/app/fw/nav/nav.js b/web/gui/src/main/webapp/app/fw/nav/nav.js
index 07a5603..30881d7 100644
--- a/web/gui/src/main/webapp/app/fw/nav/nav.js
+++ b/web/gui/src/main/webapp/app/fw/nav/nav.js
@@ -79,7 +79,7 @@
 
                 self.hideNav = hideNav;
                 $log.log('NavCtrl has been created');
-            }
+            },
         ])
         .factory('NavService',
             ['$log', '$location', '$window', 'FnService',
@@ -95,7 +95,7 @@
                     hideNav: hideNav,
                     toggleNav: toggleNav,
                     hideIfShown: hideIfShown,
-                    navTo: navTo
+                    navTo: navTo,
                 };
         }]);