EXPERIMENTAL: do not close binlog connection on commit error

Signed-off-by: Shlomi Noach <2607934+shlomi-noach@users.noreply.github.com>

go/vt/binlog/binlogplayer/dbclient.go

@@ -107,7 +107,6 @@ func (dc *dbClientImpl) Commit() error {
 	_, err := dc.dbConn.ExecuteFetch("commit", 1, false)
 	if err != nil {
 		LogError("COMMIT failed w/ error", err)
-		dc.dbConn.Close()
 	}
 	return err
 }