JAMES-1446 Osgi love

* using the custom distribution in integration tests
* switched to new versioning schema (to make the Karaf integration tests work)
* fixed some XML XSD schema urls

git-svn-id: https://svn.apache.org/repos/asf/james/server/trunk@1450569 13f79535-47bb-0310-9956-ffa450edef68