Bug 4473 - Ignore unsupported features on table features

Bug 4473 - Ignore unsupported features on table features

This patch just ignores any unsupported feature, so the controller is
 still able to connect to the switch and use the currently supported
 features.

Without this change, the connection gets dropped if the switch
implements a new feature, e.g. experimenter action, that is not yet
supported by the controller.

Change-Id: Ibb8d3e5d5bde35903277df923aeb226a42ff947b
Signed-off-by: Renato Aguiar <renato.aguiar@hpe.com>
(cherry picked from commit fa1866fd90861d8652f3868a99ad86d9929d72dc)