[FELIX-4326] Possible Invalid BundleContext exception when shutting down the extender

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1544179 13f79535-47bb-0310-9956-ffa450edef68
Include FELIX-4326 in SCR

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1544181 13f79535-47bb-0310-9956-ffa450edef68