Fix comments in class tests

src/test/class.js

@@ -153,7 +153,7 @@ describe('request enrollments', () => {
             });
     });
 
-    it('should list enrollments with valid dimensions and filters', (done) => {
+    it('should list class with valid dimensions and filters', (done) => {
         chai.request(server)
             .get('/api/v1/class?dims=region,state,education_level,school,period&filter=min_year:2015,max_year:2015,city:4106902')
             .end((err, res) => {