Use one instance of ServiceLoader per MarshallerPool rather than a system-wide instance.
The purpose is to avoid issue with class loaders in two applications are loaded as two distinct OSGi modules.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1508830 13f79535-47bb-0310-9956-ffa450edef68