replace handwritten components.xml with annotations

[hboutemy]

fixes #275

required a few compromises:

• still using Plexus annotations instead of Sisu
• one handwritten partial components.xml: because plugins parameter from parent class has different roles

but it's already a great improvement to see declaration as annotations

[kwin]

Are there technical reasons why a migration towards Sisu components is not possible or is it just to reduce implementation effort for the first step?

[hboutemy]

I tried to go directly with JSR-330 and Sisu, but unit tests failed: there is probably some upgrades to do that i don't precisely know
then I did the first step only, yes, as an implementation reduction effort