WW-4090 Add some logging

git-svn-id: https://svn.apache.org/repos/asf/struts/struts2/branches/STRUTS_2_3_14_2_X@1488899 13f79535-47bb-0310-9956-ffa450edef68
WW-4090 Uses warn level instead of debug

git-svn-id: https://svn.apache.org/repos/asf/struts/struts2/branches/STRUTS_2_3_14_2_X@1488900 13f79535-47bb-0310-9956-ffa450edef68