Missing init script of VPNaaS

The playbook runs fine but it's missing the init
script of the neutron-vpn-agent which is necessary
to handle the new VPN services created.

Also there
is a wrong service_name "neutron-vpnaas-agent" instead
of "neutron-vpn-agent" (which are the binary that are
in the python libs folder).

Correction of the
neutron_driver_vpnaas using the neutron_vpnaas package
instead of the neutron package (deprecated).

vpnaas_agent.ini - added external_network_bridge and
interface_driver that were missing

Change-Id: I953f873bcdc17f2b78bb5753753b2f52d29082e1

defaults/main.yml

@@ -197,7 +197,7 @@ neutron_services:
    config_type: "ini"
  neutron-vpnaas-agent:
    group: neutron_l3_agent
-   service_name: neutron-vpnaas-agent
+   service_name: neutron-vpn-agent
    service_en: "{{ neutron_vpnaas | bool }}"
    service_conf: vpnaas_agent.ini
    service_group: neutron_agent
@@ -258,7 +258,7 @@ neutron_driver_metering: neutron.services.metering.drivers.iptables.iptables_dri
 neutron_driver_dhcp: neutron.agent.linux.dhcp.Dnsmasq
 neutron_driver_quota: neutron.db.quota.driver.DbQuotaDriver
 neutron_driver_firewall: neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
-neutron_driver_vpnaas: neutron.services.vpn.device_drivers.ipsec.OpenSwanDriver
+neutron_driver_vpnaas: neutron_vpnaas.services.vpn.device_drivers.ipsec.OpenSwanDriver
 
 ## Quotas
 neutron_default_quota: -1

tasks/neutron_upstart_init.yml

@@ -124,3 +124,17 @@
     - neutron_services['neutron-lbaasv2-agent'].service_en | bool
   tags:
     - upstart-init
+
+- include: neutron_upstart_common_init.yml
+  vars:
+    program_name: "{{ neutron_services['neutron-vpnaas-agent'].service_name }}"
+    program_config_options: "{{ neutron_services['neutron-vpnaas-agent'].config_options }}"
+    service_name: "{{ neutron_service_name }}"
+    system_user: "{{ neutron_system_user_name }}"
+    system_group: "{{ neutron_system_group_name }}"
+    service_home: "{{ neutron_system_home_folder }}"
+  when:
+    - inventory_hostname in groups[neutron_services['neutron-vpnaas-agent']['group']]
+    - neutron_services['neutron-vpnaas-agent'].service_en | bool
+  tags:
+    - upstart-init

templates/vpnaas_agent.ini.j2

@@ -1,4 +1,9 @@
 # {{ ansible_managed }}
 
+[DEFAULT]
+external_network_bridge = {{ neutron_external_network_bridge }}
+
+interface_driver = {{ neutron_driver_interface }}
+
 [vpnagent]
 vpn_device_driver = {{ neutron_driver_vpnaas }}