Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=57363
Log to stderr if LogManager is unable to read configuration files rather than swallowing the exception silently.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1647044 13f79535-47bb-0310-9956-ffa450edef68