Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55629
Merged revision 1529787 from tomcat/trunk:
Remove JMX notification listener when destroying servlet o.a.catalina.manager.StatusManagerServlet

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1529796 13f79535-47bb-0310-9956-ffa450edef68