Added cached Instantiator to be used in production instead of the Runtime version

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | [Runtime Instantiator is dangerous to be used in Production, and you probably should not need to code your own implementation of a cached one everytime you need to use Lazy Loading. Solution, use this one instead.]
| License       | MIT
| Doc PR        | 

You should probably also set a base proxy namespace.