Using SiteDB v2 API

Replacing old SiteDB v1 API with v2.
Have to use pycurl, otherwise getting
zlib.error: Error -3 while decompressing data: incorrect header check
when calling SiteDB.
Configuration updated.

Fixes #4625
Merge pull request #4661 from zdenekmaxa/reqmgr-sitedbv2api-4625

Using SiteDB v2 API