Move default Keystone API version to v3

This patch sets Keystone v3 as default in services
configuration files and in the openrc and stackrc scripts.

Change-Id: I24546f02067ea23d088d383b85e3a78d7b43f165
Partially-Implements: bp keystonev3
diff --git a/lib/nova_plugins/hypervisor-ironic b/lib/nova_plugins/hypervisor-ironic
index c6ed85d..2aa9b12 100644
--- a/lib/nova_plugins/hypervisor-ironic
+++ b/lib/nova_plugins/hypervisor-ironic
@@ -47,7 +47,7 @@
     # ironic section
     iniset $NOVA_CONF ironic admin_username admin
     iniset $NOVA_CONF ironic admin_password $ADMIN_PASSWORD
-    iniset $NOVA_CONF ironic admin_url $KEYSTONE_AUTH_URI/v2.0
+    iniset $NOVA_CONF ironic admin_url $KEYSTONE_AUTH_URI/v3
     iniset $NOVA_CONF ironic admin_tenant_name demo
     iniset $NOVA_CONF ironic api_endpoint $IRONIC_SERVICE_PROTOCOL://$IRONIC_HOSTPORT/v1
 }