Trace a warning when several used component interfaces have same component key provider

[labordep]

Sometimes, several components can be instanciate with the same key provider (for example #default). These components can propose same part of their component interfaces (services, events, parameters). This is a possible source of mistake for the developper, to help debug I propose to log that. A lot of possibility:

• Log activated component which have component interface provider with name already used
• Log use of an interface with ambiguous provider, because there is several component interfaces with the same key provider
• ?