Additional fix for BZ 55839 required by DataSourceRealm

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1548182 13f79535-47bb-0310-9956-ffa450edef68
Additional fix for BZ 55839 required by JDBCRealm

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1548183 13f79535-47bb-0310-9956-ffa450edef68
Additional fix for BZ 55839 required by MemoryRealm

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1548185 13f79535-47bb-0310-9956-ffa450edef68