workflows: process arxiv math workflow update

* Adds HP_IDENTIFIERS Knowledge Base. Requires inveniomanage database recreate.

* Matches incoming records with objects in Holding Pen.

* If an object is matched updates old object and deletes the new one.

* Adds possible new identifiers to the Knowledge Base.

Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
Merge pull request #141 from GiorgosPa/knowledge

workflows: process arxiv math workflow update