JS: update queries and tests for improved type inference

javascript/ql/test/library-tests/frameworks/HTTP-heuristics/src/middleware-attacher-getter.js

@@ -7,7 +7,7 @@ function getAttacher1 (app) {
 
 var app = express();
 getAttacher1(app);
-
+confuse(getAttacher2); // disable the type inference
 
 function getAttacher2 (app) {
     return function(h) {
@@ -17,3 +17,4 @@ function getAttacher2 (app) {
 
 var app = express();
 getAttacher2(app)(function(req, res){});
+confuse(getAttacher2); // disable the type inference

javascript/ql/test/library-tests/frameworks/HTTP-heuristics/src/route-objects.js

@@ -58,3 +58,4 @@ function wrap(f){
     }
 }
 app[route3.method](route3.url, wrap(route3.handler));
+confuse(wrap); // confuse the type inference