ARIES-1251 Small refactoring of NSHandler and test

git-svn-id: https://svn.apache.org/repos/asf/aries/trunk@1628505 13f79535-47bb-0310-9956-ffa450edef68
ARIES-1251 Fixes for Synchronization and Close support

git-svn-id: https://svn.apache.org/repos/asf/aries/trunk@1628506 13f79535-47bb-0310-9956-ffa450edef68
ARIES-1234 Remove jpa20 module

git-svn-id: https://svn.apache.org/repos/asf/aries/trunk@1628673 13f79535-47bb-0310-9956-ffa450edef68