* Allow registering of OCS routes with the appframework

* Make the router handle OCS AppFramework Routes

* Make the OCS endpoint handle the new OCS AppFramework routes

* Move Sharees api over to use OCSController

* Move federation api over to use OCSController - fixes #20771

* Inject router into url generator and make tests db independent

* Fixing typo

* Fixing unit tests in federation and sharing related to changes in ocs routes

* Default response format for OCS is xml

* Handle LoginException in ocs calls

* Fix comment

* Fix webroot in router

* Adding undefined field in SessionMiddleware

* Federation handshake calls do no require any authentication

* Adding integration test to ensure that federation handshake behaves properly