Add WeakReferenceLifetimeManager

[ENikS]

Description

At present ExternallyControlledLifetimeManager is being used as a weak reference lifetime manager. It is allowed to be used in all types of registrations.

Problem

If a Type or Factory are registered with ExternallyControlledLifetimeManager it works like this:

• No instance is present: create a new one and hold a weak reference
• Instance is still alive: return the instance
• Instance went out of scope: create a new instance

In case of externally registered instance the container has no knowledge of how to create a new instance. This break the logic above.

The solution to this problem is to reserve ExternallyControlledLifetimeManager to be registered only with external instances and keep strong reference to these to prevent it from being collected by GC.