Potential fix for APLO-293: Since the CURRENT and MANIFEST files might not be append only doing a hard link was not right since they might get updated via the hardlink after the snapshot occurs.

git-svn-id: https://svn.apache.org/repos/asf/activemq/activemq-apollo/trunk@1465405 13f79535-47bb-0310-9956-ffa450edef68