Fixed a bug in version detection

[takapi327]

Implementation Details

We verified and confirmed a bug where the Version.compare() method returned -1 instead of 0 when comparing equivalent versions, through 30 tests. This bug affected all of the following callers

• DatabaseMetaDataImpl: compare(Version(9, 3, 0)) match case 1 => pattern (4 locations) incorrectly branches to the legacy path when the exact version is 9.3.0
• DatabaseMetaDataImpl: compare(Version(5, 6, 4)) >= 0 pattern (4 locations) incorrectly evaluates to false when the exact version is 5.6.4
• CachingSha2PasswordPlugin: Uses old transformation when version is exactly 8.0.5
• CharsetMapping.isOkayForVersion(): Returns false for equivalent versions (should return true)

Pull Request Checklist

• Wrote unit and integration tests
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code formatting by scalafmt (sbt scalafmtAll command execution)
• Add copyright headers to new files

References