Make it simpler for t-engines based on the deprecated base
* Move TransformException back to its original location
* Provide an ExtensionService in its original location
* Provide a Mimetype class in its original location
* Fix the build failure in CombinedTransformConfigTest
* Split TransformStream and TransformProcess out of TransformHandler
* TestFileInfo to FileInfo
* Removed HttpRequestTests as it adds nothing now the controller is in the base
* Initialised the internal context to TranformRequest tests
* Rename AbstractQueueTransformServiceIT to AbstractQueueTest and change names of subclasses
Cleaned up the logic and added a comment to say what it was doing (sends messages ok, but fails the transform)
* Clean up application-default.yaml values (duplicate values)
* Renamed probe test files to be probe.???