GOCDB v5.7 release

Major changes:
• Addition of new monitoring attributes to service endpoints for ARGO monitoring. This has allowed ARGO to remove its dependency on the BDII, and GOCDB is now the only information system used for ARGO monitoring.
• A new write API for managing custom properties was implemented as requested by the WLCG Information Systems Task Force. This allows site admins to manage their own DN based ACLs per site required to post updates for a site/service. https://rt.egi.eu/rt/Ticket/Display.html?id=11020
• Cursor paging https://rt.egi.eu/rt/Ticket/Display.html?id=10716
• Federated access https://rt.egi.eu/rt/Ticket/Display.html?id=7493