Refactored the DataPolicyConverter for basic code cleanup and added a value to the Policy enum for PARTITION.  Added additional test cases in the corresponding test class.  Refactored the resolveDataPolicy method in the RegionFactoryBean making use of helper methods.
Fixes JIRA issue SGF-203 involving the <gfe:*-region/> element's persistent, data-policy, and for client Regions, shortcut attributes.
Additional tests cases for SGF-203 involving persistence.
Additional fixes for SGF-203 involving the persistent, data-policy and shortcut attributes of client Regions.
Code changes based on code review by David Turanski in PR #33 for JIRA issue SGF-203 concerning persistence.
Merged PR #33 to fix JIRA issue SGF-203 concerning persistence.
Added addition Javadoc comments and performed additional formatting/code organization.