Enable CORS (#669)

Author: javierdlrm

hopsworks-api/src/main/java/io/hops/hopsworks/rest/application/config/ApplicationConfig.java

@@ -134,8 +134,8 @@ public ApplicationConfig() {
     register(io.hops.hopsworks.api.opensearch.OpenSearchResource.class);
 
     //uncomment to allow Cross-Origin Resource Sharing
-    // register(io.hops.hopsworks.filters.AllowCORSFilter.class);
-
+    register(io.hops.hopsworks.filters.AllowCORSFilter.class);
+    
     //swagger
     register(io.swagger.jaxrs.listing.ApiListingResource.class);
     register(io.swagger.jaxrs.listing.SwaggerSerializers.class);