Review of r1428643
Align implememntation between IS_SECURITY_ENABLED true and false branches
(essentially add i18n to the IS_SECURITY_ENABLED==true branch).

Add the same fix to setFilterDef(null), though I think nobody passes null filterDef to that method.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1428993 13f79535-47bb-0310-9956-ffa450edef68