Convert Resolver tests to JUnit tests.

The resolver module contains a Main class that can run a number of test
invocations against the resolver. However, this Main class does not
contain any assertions. This commit converts the resolver test code into
unit tests that contain assertions so that they can be run automatically
as part of the Maven build.


git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1611566 13f79535-47bb-0310-9956-ffa450edef68