Added docs.

Change-Id: Ied48c2b89b892eb4701fabc98cf1245e18b373b4
Signed-off-by: Liem Nguyen <liem_m_nguyen@hp.com>
Refactoring of TokenAuthFilter and added more documentation.

Change-Id: If2ce2cb4abec9279b1f5fda94748edcb2794e5ce
Signed-off-by: Liem Nguyen <liem_m_nguyen@hp.com>