Upgraded OpenJPA from 2.0.1 to 2.2.2, introduced test scope commons-pool dependency in weblogger-web (tests would no longer work in the upgrade to OpenJPA 2.2.2 otherwise, although I'm unsure how they managed to work without commons-pool with OpenJPA 2.0.1), switched from field access to getter methods in JPA entity classes to get reduce OpenJPA warnings during build.

git-svn-id: https://svn.apache.org/repos/asf/roller/trunk@1487153 13f79535-47bb-0310-9956-ffa450edef68