Adds liniting into the workflow (#3082)

* initial linting of src

* fix indent to 2 spaces

* Removes unnecessary rules

* ignore spec folder for now

* Spec linting

* Fix spec indent

* nits

* nits

* no no-empty rule

src/authDataManager/google.js

@@ -58,7 +58,7 @@ function request(path) {
         data = JSON.parse(data);
         resolve(data);
       });
-    }).on('error', function(e) {
+    }).on('error', function() {
       reject('Failed to validate this access token with Google.');
     });
   });