Singleton invalidation

[Tishka17]

container.invalidate(Pool) to remove an object from cache so it can be recreated

[Tishka17]

it's a dangerous call because there could be created objects which rely on the one we are trying to invaldate. Also, it's not clear whether we need to call finalizer or not (probably we can just add a parameter)

[Tishka17]

a) close must clean all except context data so the container will be reused
b) APP-container can be recreated from RUNTIME one

[Tishka17]

Since version 1.2 you can call close to cleanup all dependencies and continue using same container