Spring context refactoring

* added file-queue spring context
* moved OSGi service declarations from loaders-osgi.xml
* moved more bean post-processors in loaders-context.xml
* importing activemq bean definitions from activemq-context.xml

git-svn-id: https://svn.apache.org/repos/asf/james/server/trunk@1444410 13f79535-47bb-0310-9956-ffa450edef68