test: increase flush time for broken test

Author: Narretz

test/ngAnimate/animateCssSpec.js

@@ -1261,7 +1261,7 @@ describe("ngAnimate $animateCss", function() {
           expect(element.css(prefix + 'transition-delay')).toContain('3s');
 
           // Let's flush the remaining amout of time for the timeout timer to kick in
-          $timeout.flush(500);
+          $timeout.flush(600);
 
           expect(element.css(prefix + 'transition-delay')).toBe('');
         }));