Merge pull request #5712 from RosettaCommons/roccomoretti/interactive_test_server_ubuntu2
[Foldit] Address test server dependency handling.
The current benchmark server Linux build tests (and thus the unit tests) for Foldit are failing due to the update to RDKit no longer working with GCC 4.8.
@lyskov helpfully enabled Ubuntu 20.04 based tests (instead of the CentOS 7 based tests we had), but those builds were failing due to dependency issues. I was able to resolve that by building the dependencies on Ubuntu 20.04, adding them to the svn repo, and adjusting the benchmark build script to use those dependencies for the platform.