Improved documentation in ResourceProviderEntry, mainly targetted at someone reading the code. No code changes.

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1443887 13f79535-47bb-0310-9956-ffa450edef68
 SLING-2725 Pulled in a test class from HttpClient 3.1 to cover the URI class just in case it ever gets changed. URITest has had some tests removed to eliminate additional dependencies. Added a second Unit test to make up for missing coverage. More tests to follow.

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1443888 13f79535-47bb-0310-9956-ffa450edef68
SLING-2725 Added mockito as a test dependency in preparation for wider unit tests.

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1443889 13f79535-47bb-0310-9956-ffa450edef68