Refactor quattor/schema

`quattor/schema` can't be used from the `template-library-core` repository due to the missing `monitoring/lemon/schema`. 
With the refactor,it is now possible for components to include only the component relevant types and nothing else, so we can unittest the templates shipped by e.g. the components with only dependency on this repo.

yes, it's bad that our core repository has so much legacy stuff.