Major Description
In the Java Shindig implementation DefaultOAuthUriManager looks for a container configuration property called "gadgets.uri.oauth.callbackTemplate" which doesn't exist anywhere in the current codebase, however there is a property called "gadgets.oauthGadgetCallbackTemplate" in the default container.js file which is referenced in a few places by the PHP Shindig implementation. This patch renames the "gadgets.oauthGadgetCallbackTemplate" property to "gadgets.uri.oauth.callbackTemplate" (since the latter is more inline with the rest of the configuration property names) and updates the PHP usages accordingly. Note that I don't run PHP Shindig so I don't really have any way to test if anything broke on the PHP end.