Refactor a bit the inventory for edpm case

01-site:
Ensure we get a consistent format (yaml)

02-computes + host_vars/localhost:
Ensure the "ansible_connection" parameter is passed from within the
inventory, so that it's more obvious. Until now, we may just edit the
02-computes to inject our remote hosts, and not get what we want since
ansible will just use the local node instead of connecting to the
remotes.

Change-Id: I33b07d615beafecd5fe97cbca54c6a296965af8f

tripleo_ansible/inventory/01-site

@@ -1,11 +1,14 @@
-# allovercloud group is needed by tripleo_ssh_known_hosts
-[allovercloud:children]
-overcloud
-
-# primary_role_name used by some plays to target the primary role first
-[primary_role_name:children]
-
-[overcloud:children]
-Compute
-
-[Compute]
+---
+all:
+  children:
+    # allovercloud group is needed by tripleo_ssh_known_hosts
+    allovercloud:
+      children:
+        overcloud:
+    # primary_role_name used by some plays to target the primary role first
+    primary_role_name:
+      children:
+    overcloud:
+      children:
+        Compute:
+    Compute:

tripleo_ansible/inventory/02-computes

@@ -3,6 +3,7 @@ Compute:
     # Add additional computes here, and optionally drop localhost.
     # Add host vars under the host_vars dir.
     localhost:
+      ansible_connection: local
   vars:
     service_net_map:
       nova_api_network: internal_api

tripleo_ansible/inventory/host_vars/localhost

@@ -1,6 +1,4 @@
 ---
-
-ansible_connection: local
 ctlplane_ip: 192.168.24.100
 internal_api_ip: 192.168.24.2
 tenant_ip: 192.168.24.2