7197491: update copyright year to match last edit in jdk8 jdk repository
Reviewed-by: chegar, ksrini

7045655: An empty InMemoryCookieStore should not return true for removeAll
Summary: CookieStore.removeAll() should return false for an empty CookieStore
Reviewed-by: chegar

6953455: CookieStore.add() cannot handle null URI parameter, contrary to the API
Reviewed-by: chegar, mduigou
Contributed-by: kurchi.subhra.hazra@oracle.com