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/glance b/lib/glance
index 0431bba..bf0643b 100644
--- a/lib/glance
+++ b/lib/glance
@@ -205,7 +205,7 @@
     iniset $GLANCE_CACHE_CONF DEFAULT use_syslog $SYSLOG
     iniset $GLANCE_CACHE_CONF DEFAULT image_cache_dir $GLANCE_CACHE_DIR/
     iniuncomment $GLANCE_CACHE_CONF DEFAULT auth_url
-    iniset $GLANCE_CACHE_CONF DEFAULT auth_url $KEYSTONE_AUTH_URI/v2.0
+    iniset $GLANCE_CACHE_CONF DEFAULT auth_url $KEYSTONE_AUTH_URI/v3
     iniuncomment $GLANCE_CACHE_CONF DEFAULT auth_tenant_name
     iniset $GLANCE_CACHE_CONF DEFAULT admin_tenant_name $SERVICE_TENANT_NAME
     iniuncomment $GLANCE_CACHE_CONF DEFAULT auth_user