[Task] Simplify controllers resource links

[taorepoara]

What should be done

In the current state of the server, we have to check in every controller that the resources in the path match (ex: /apps/:app_id/envs/:env_id have to check that the env id is corresponding to the app id).

In order to handle those checks easily, create a macro automate them in the controllers or as a router function.

Also automate corresponding checks in the unit tests.

Technical recommandation

I think that a plug in the router could be the best way to automate that.

Is this task linked with any other ?

Unit test checking that kind of things have been added to the next issue resolution:

#532 (comment)