Group and give provenance information on crawler traps in crawler-beans.cxml

The list of filters in the job configuration file (crawler-beans.cxml) is huge and does not contain provenance information (are they global/specific ? if specific, from which domain?).

The proposal is to add a comment with provenance information:

<!-- crawlertraps from RejetGeneral --> individual group name for global crawler traps.

<!-- crawlertraps from bnf.fr -->for domain specific crawler traps.

Consequence of this grouping is that global crawler traps cannot be deduplicated.