TomcatInstrumentableClassLoader should support Tomcat 7.0.63+ as well

TomcatInstrumentableClassLoader in spring-instrument-tomcat contains a method override:

@Override
protected ResourceEntry findResourceInternal(String name, String path) {
    ...
}

which in Tomcat 7.0.63 no longer exists. Another parameter has been added, and the method signature is now:

protected ResourceEntry findResourceInternal(String name, String path, boolean manifestRequired)

(see http://svn.apache.org/repos/asf/tomcat/tc7.0.x/tags/TOMCAT_7_0_63/java/org/apache/catalina/loader/WebappClassLoader.java)

The "overridden" method is never called, so the weaving process fails silently. Issue does not reproduce on Tomcat 7.0.62.