In SERVER-122161, we started comparing the full versions (e.g. "8.0.16" with "8.3.2-rc4321") for CheckReplDBHash.

This is problematic because during the Server release process there is a window of time during which the version strings haven't been updated yet. In this case we will try to compare versions like "8.3.2-rc1234" and "8.3.2-rc4321" which will throw.

Fix this by just comparing the "major.minor" part. This is sufficient for practical purposes, specially considering after 9.0 we can remove this code - see SERVER-101594.