We need to fix small issues to make it work under websphere app server 6.1 together with magnolia websphere module

• FilterManager fails to extract definitions
• request.getPathInfo() does not follow servlet specs as a result magnolia cms filter fails to handle page requests
• on webapp restart ManagedCacheManager tries to register MBean without checking for existence
• IllegalAccessException on MgnlCommand.execute (when pooling) if the command constructor is not public
• Cache and resource dispatchers does not set response status