Add a parameter to swtich agent package

[Arnaud Morin]

On Ubuntu 14.04, when using both VPNaaS and FWaaS, puppet will remove neutron-vpn-agent and install neutron-l3-agent instead.
This behavior is normal because neutron-vpn-agent is a superset of neutron-l3-agent.
See bug: https://bugs.launchpad.net/ubuntu/+source/neutron/+bug/1303876

But at the end, neutron ends up with a non working VPNaaS.

Proposed patch is to add a parameter to use neutron-vpn-agent instead of neutron-l3-agent package in neutron::services::fwaas class.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/99440

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/99440
Committed: https://git.openstack.org/cgit/stackforge/puppet-neutron/commit/?id=a6102c07dbf29b7f64276c22abecb0bc74f2ca0f
Submitter: Jenkins
Branch: master

commit a6102c07dbf29b7f64276c22abecb0bc74f2ca0f
Author: Arnaud Morin <email address hidden>
Date: Wed Jun 11 20:09:49 2014 +0200

    Add vpnaas_agent_package parameter to FWaaS

    On debian platforms, when using both VPNaaS and FWaaS, puppet will
    remove neutron-vpn-agent and install neutron-l3-agent instead.
    This behavior brokes VPNaaS.

    As neutron-vpn-agent package is a superset of neutron-l3-agent, we
    should install neutron-vpn-agent instead of neutron-l3-agent when
    needed.

    This patch will add a boolean parameter called vpnaas_agent_package
    to neutron::services::fwaas in order to give the choice to install
    neutron-vpn-agent package instead of neutron-l3-agent package on
    debian platforms.

    Change-Id: I812dc1b53c77fe2e01ccd8a4e3f718c9a990f77c
    Closes-Bug: 1328534