Allowed timeout param & Removed repetition

Author: Siddhantshukla814

lib/webpagetest.js

@@ -536,12 +536,11 @@ function runTest(what, options, callback) {
 }
 
 function runTestAndWait(what, options, callback) {
-  delete options.pollResults, options.timeout;
-  delete options.timeout;
+  delete options.pollResults;
 
-  options = Object.assign(options, { pollResults: 10 });
+  options = Object.assign(options, { pollResults: 13 });
 
-  new Promise((resolve) => {
+  return new Promise((resolve) => {
     let test = runTest.bind(this, what, options, callback);
     resolve(test());
   });