Added a method to CombinedReloadingController for initially reseting the
reloading state of sub controllers.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1463690 13f79535-47bb-0310-9956-ffa450edef68
Added some test implementations for ReloadingDetector.

These classes are used to produce specific reloading behavior in test cases.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1463691 13f79535-47bb-0310-9956-ffa450edef68