Rudder

In generic methods reporting, the second parameter of _log_v3 is the component key used for reporting.

This value is already in the reporting context and it is the context version that is used by default if this value is empty.

The value from the reporting context is the one used to report NAs

To make it consistent, and less error prone we could just replace it by "" in each generic method.
Moreover, this would permit customization of component key, which is especially useful in hand made techniques.