Inconsistent endpoints for REST API list components.

There are two different endpoints for listing components in TCOMP, and only one supports filters.

For example, the following works with filters:

http://localhost:8989/tcomp/definitions/components?executionEngine=BEAM&typology=TRANSFORMER

But the following returns all components and the parameters are quietly ignored:

http://localhost:8989/tcomp/definitions/COMPONENT?executionEngine=BEAM&typology=TRANSFORMER

These should be consistent, and preferably offer one endpoint instead of two that do the same thing.

For both cases, the documentation at https://github.com/Talend/components/wiki/7.-Components-REST-service#list-component-definitions is wrong.