SERVER-8502 Make sure authMechanism is actually used when running auth passthrough tests
Wrap servers.js in function call to avoid polluting global namespace
SERVER-8502 Only set authenticationMechanisms if authMechanism is not MONGODB-CR
SERVER-4808 Provide repo downloads of older versions of packages

This is used to consolidate multiple package versions into one
repository directory.
SERVER-7692 RPM and Deb package for Subscriber Edition

Pulling in changes from tested version with ssl dependency and
spec conflicts with old versions of community packages