Drop duplicated exception handle code from docker driver
Drop duplicated exception handle code from docker driver

Due to docker.errors.APIError is wrapped at DockerHTTPClient,
duplicated exception handle code from docker driver can be removed.

Change-Id: I3accc317cc8a79741934098d853e7749a0f59844

kevin-zhaoshuai/zun,kevin-zhaoshuai/zun,kevin-zhaoshuai/zun