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

spec/EnableSingleSchemaCache.spec.js

@@ -27,7 +27,7 @@ describe('Enable single schema cache', () => {
       config = fakeRequestForConfig();
       nobody = auth.nobody(config);
       return rest.find(config, nobody, 'Bar', {type: 1});
-    }).then((response) => {
+    }).then(() => {
       fail('Should throw error');
       done();
     }, (error) => {