refactor client to use the new request method from boto

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
remove unused import

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
ensure the tests are failing quickly

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
refactor the request helpers out of client

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>