Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=54534
Ensure that when loading Servlet instances the correct class loader is used.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1443350 13f79535-47bb-0310-9956-ffa450edef68
Add support for CombinedRealm in Storeconfig.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1443353 13f79535-47bb-0310-9956-ffa450edef68