Remove 'force_gateway_on_subnet' option

[Sreekumar S]

The 'force_gateway_on_subnet' option is deprecated and should be removed in the 'Newton' cycle.
This is raised for tracking the removal of the option in Newton.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/295843

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/295843
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=7215168b119c11a973fbdff56c007f6eb157d257
Submitter: Jenkins
Branch: master

commit 7215168b119c11a973fbdff56c007f6eb157d257
Author: Sreekumar S <email address hidden>
Date: Tue Mar 22 19:17:54 2016 +0530

    Removing 'force_gateway_on_subnet' option

    With this fix 'force_gateway_on_subnet' configuration
    option is removed, and gateway outside the subnet is
    always allowed. Gateway cannot be forced onto to the
    subnet range.

    DocImpact: All references of 'force_gateway_on_subnet'
    configuration option and its description should be
    removed from the docs.

    Change-Id: I1a676f35828e46fcedf339235ef7be388341f91e
    Closes-Bug: #1548193

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack/neutron 9.0.0.0b1 development milestone.