Simplify the code of o.a.c.ha.tcp.SimpleTcpCluster.createManager(String).
Remove unnecessary class cast.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1562726 13f79535-47bb-0310-9956-ffa450edef68
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=56082
Fix thread safety issue in JULI's LogManager implementation

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1562748 13f79535-47bb-0310-9956-ffa450edef68