[dashboard]Chef should set enable_lb/enable_vpn/enable_firewall to True by default

[Hong Hui Xiao]

According to the latest document from horizon:

****************************************************************************************
``enable_lb``:

.. versionadded:: 2013.1(Grizzly)

(Deprecated)

Default: ``True``
This option is now marked as "deprecated" and will be removed in Kilo or later release.
The load balancer panel is now enabled only when LBaaS feature is available in Neutron
and this option is no longer needed. We suggest not to use this option to disable the
load balancer panel from now on.
**************************************************************************************

Chef should set enable_lb/enable_vpn/enable_firewall to True by default, and let horizon to check if the service is enabled and then show the panel.

[Mark Vanderwiel (vanderwl)]

If these are truly deprecated, they should just be removed.

Please provide a link to the deprecated code/doc/patch.

[Hong Hui Xiao (xiaohhui)]

The document about these configurations from horizon is at

https://github.com/openstack/horizon/blob/master/doc/source/topics/settings.rst

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/187917

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/cookbook-openstack-dashboard ocata-eol release.