In rest, make DELETE, PATCH, PUT / not allowed and add tests.

[LoicPoullain]

Issue

• DELETE /, PATCH /, PUT / should return a METHOD NOT ALLOWED not a NOT FOUND.
• rest controller factory should have tests.

Solution and steps

• Add more Routes to rest.
• Add more tests.

Checklist

• Add/update/check docs.
• Add/update/check tests.
• Update/check foal generator repo. (Add controller factory spec file. generator-foal#30).