Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55282
Merged revision 1597855 from tomcat/trunk:
o.a.t.util.descriptor.web.ApplicationListener overrides equals and hashCode methods.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1597858 13f79535-47bb-0310-9956-ffa450edef68