OPENIG-115 Increase unit test coverage CR-3584
- Added unit tests for the ConnectionHeader.
- Fixed CookieHeaderTest, LocationHeaderTest.
- Small code cleanup.

** ConnectionHeader.java
- Added getter to tokens => Modified HttpClient.java.



git-svn-id: https://svn.forgerock.org/openig@188 dbb9e58e-28e6-4ce0-90e8-f11d9605b710