BATCH-2110: Updated batch to support Spring 4
* Refactored iBatis based readers and writers to not utilize
 SqlMapClientTemplate.
* Depricated all iBatis based readers and writers in favor of MyBatis's
 native Spring support.
* Updated XStream support to 1.4.4 and Jettison to 1.2 to be in
 alignment with Spring 4.
* Added the PooledEmbeddedDataSource to address the issue outlined in
 SPR-11372.