Improved logging.

git-svn-id: https://svn.apache.org/repos/asf/axis/axis2/java/core/trunk@1593764 13f79535-47bb-0310-9956-ffa450edef68
AXIS2-5646: Fixed some NPEs that occur when stopping the Axis2 OSGi bundle.

git-svn-id: https://svn.apache.org/repos/asf/axis/axis2/java/core/trunk@1593765 13f79535-47bb-0310-9956-ffa450edef68