Added a helper method for testing equals() to ConfigurationAssert.

The already existing assertEquals() method was renamed because there was a
name clash with static imports.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1523794 13f79535-47bb-0310-9956-ffa450edef68
Added an implementation class for FileLocator.

FileLocatorUtils offers a new method for creating FileLocator objects using a
fluent interface.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1523795 13f79535-47bb-0310-9956-ffa450edef68