[client] updated multi-row transaction API

This patch removes KuduTransactionSerializer and switches to using
KuduTransaction::SerializationOptions instead.

Change-Id: Id646c41d60f385f079ebfaec2daf7c2a108306b2
Reviewed-on: http://gerrit.cloudera.org:8080/16948
Reviewed-by: Andrew Wong <awong@cloudera.com>
Tested-by: Kudu Jenkins
Reviewed-by: Hao Hao <hao.hao@cloudera.com>
Reviewed-by: Grant Henke <granthenke@apache.org>
5 files changed