Move nova-fake config into globals.yml

1. move nova-fake config into globals.yml
2. fix the docs

Change-Id: I6fa4df97831bb08f50338e98dc3e0d4de7120edf

doc/source/reference/nova-fake-driver.rst

@@ -24,8 +24,8 @@ with neutron-openvswitch-agent on the compute nodes. Therefore, in the
 inventory the network node must be different than the compute node.
 
 By default, Kolla uses libvirt driver on the compute node. To use nova-fake
-driver, edit the following parameters in ``ansible/group_vars`` or in the
-command line options.
+driver, edit the following parameters in ``/etc/kolla/globals.yml`` or in
+the command line options.
 
 ::
 

etc/kolla/globals.yml

@@ -191,6 +191,7 @@ kolla_internal_vip_address: "10.10.10.254"
 #enable_neutron_agent_ha: "no"
 #enable_neutron_vpnaas: "no"
 #enable_neutron_sfc: "no"
+#enable_nova_fake: "no"
 #enable_nova_serialconsole_proxy: "no"
 #enable_octavia: "no"
 #enable_opendaylight: "no"
@@ -318,6 +319,9 @@ kolla_internal_vip_address: "10.10.10.254"
 # Valid options are [ qemu, kvm, vmware ]
 #nova_compute_virt_type: "kvm"
 
+# The number of fake driver per compute node
+#num_nova_fake_per_node: 5
+
 #################
 # Hyper-V options
 #################