Add a missing config value for Compute Nodes

Includes the linuxnet_interface_driver config parameter when
Neutron is enabled in Computes Nodes

Closes-Bug: #1251096
Change-Id: Ib1871970b6feb74364d77099999c4403190417d8

doc/install-guide/section_neutron-install.xml

@@ -986,6 +986,7 @@ neutron_admin_tenant_name=service
 neutron_admin_username=neutron
 neutron_admin_password=<replaceable>NEUTRON_PASS</replaceable>
 neutron_admin_auth_url=http://<replaceable>controller</replaceable>:35357/v2.0
+linuxnet_interface_driver = nova.network.linux_net.LinuxOVSInterfaceDriver
 firewall_driver=nova.virt.firewall.NoopFirewallDriver
 security_group_api=neutron</programlisting>
         <note>