Move GardeningServer out of BuildSlaveSupport

Tools/GardeningServer/scripts/Buildbot.js

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 60 matching lines @@
 
     resultsDirectoryURL: function(builderName, buildName) {
         return this.baseURL + this._resultsDirectory + encodeURIComponent(builderName) + '/' + encodeURIComponent(buildName) + '/';
     },
 
     _buildersForNames: function(names) {
         var self = this;
         return names.map(function(name) { return self.builderNamed(name) });
     },
 };