Add commit hashes to logged versions in upgrader

So, we know that we upgrade from and to different builds/snapshots,
not the same.

testing/upgradetest/upgrader.go

@@ -233,7 +233,7 @@ func PerformUpgrade(
 		}
 	}
 
-	logger.Logf("Upgrading from version %q to version %q", startParsedVersion, endVersionInfo.Binary.String())
+	logger.Logf("Upgrading from version %q (%s) to version %q (%s)", startParsedVersion, startVersionInfo.Binary.Commit, endVersionInfo.Binary.String(), endVersionInfo.Binary.Commit)
 
 	upgradeCmdArgs := []string{"upgrade", endVersionInfo.Binary.String()}
 	if upgradeOpts.sourceURI == nil {