BibCirculation: fix for CERN returnees

Acked-by: Tibor Simko <tibor.simko@cern.ch>
elasticsearch: Integrated Lumberjack into Invenio

* Added disabled-by-default config options for Elasticsearch logging.
* Replaced rnkPAGEVIEWS and rnkDOWNLOADS with Elasticsearch.

Signed-off-by: Joe MacMahon <joe.macmahon@cern.ch>