Call Dispose on IDispose Services held by ServiceRegister

The ServiceRegister is IDisposable, simply calls clear on it's dictionary of services. If those services are considered owned by the ServiceRegister it should be chain calling Dispose on any services in that container before clearing. It seems reasonable and convenient to assume as much in many cases.

Start by locating ServiceRegister and reading its IDisposable implementation, especially the dictionary clearing described in the issue. Determine whether contained services are owned by it and how IDisposable services are represented. Done means owned IDisposable services are disposed before the dictionary is cleared, with the project tests passing.

Escrita pelo modelo de indexação a partir do texto da issue.