Partial revert to upgrade messages to warn.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1602188 13f79535-47bb-0310-9956-ffa450edef68
Pull up getLog() and add some supporting plumbing

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1602189 13f79535-47bb-0310-9956-ffa450edef68