Comment 10 for bug 1626442

Reviewed: https://review.fuel-infra.org/35143
Submitter: Denis V. Meltsaykin <email address hidden>
Branch: openstack-ci/fuel-7.0/2015.1.0

Commit: cf1e6fcba50b25200ce9b55596d06f36aefeb544
Author: Rodion Tikunov <email address hidden>
Date: Wed May 17 12:27:18 2017

Added --enable-snat option for router-gateway-set

If enable_snat_by_default option set to false and disable snat via cli
it becomes unavailable to enable snat again.
This commit allows to enable snat after disabling it.

Change-Id: I01009d5cd5edd5be3eead615c37d6aa2e3224442
Closes-Bug: #1626442
(cherry picked from commit cc1d3fdd3582b0bbc2e24b65b9c690b5f0318148)