Add failing test for cloning containers with parameterised subcontainers
Allow cloning of containers with parameterized subcontainers
Add a basic failing test for parameterised subcontainers depending on services in their enclosing container
Make containers created from parameterized containers identifyable by their class
Make containers created from parameterized containers reference their parents non-weakly

Their parent won't have a reference to them - it only has a reference to the
parameterized container they were created from.
Set parent for containers created from parameterized containers