* refactored nxos_acl * refactor nxos_acl_interface * refactor nxos_banner * refactor nxos_bgp * fix typo
* nxos does not have `authorize` * Enable nxos_banner nxapi tests
* Add nxos_banner implementation module Signed-off-by: Trishna Guha <trishnaguha17@gmail.com> * nxos_banner integration test Signed-off-by: Trishna Guha <trishnaguha17@gmail.com> * nxos_banner unit test Signed-off-by: Trishna Guha <trishnaguha17@gmail.com> * doc update Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>