Configure horizon with identity v3

Currently horizon configures keystone using v3 only if v2 is not
available. Really we should just always be using v3.

Change-Id: Icac4d90b617209da75abf33f8e25ffc021c45fdb
diff --git a/lib/horizon b/lib/horizon
index b0f306b..108a7f0 100644
--- a/lib/horizon
+++ b/lib/horizon
@@ -98,13 +98,8 @@
 
     _horizon_config_set $local_settings "" OPENSTACK_HOST \"${KEYSTONE_SERVICE_HOST}\"
 
-    if [ "$ENABLE_IDENTITY_V2" == "False" ]; then
-        # Only Identity v3 API is available; then use it with v3 auth tokens
-        _horizon_config_set $local_settings "" OPENSTACK_API_VERSIONS {\"identity\":3}
-        _horizon_config_set $local_settings "" OPENSTACK_KEYSTONE_URL "\"${KEYSTONE_SERVICE_PROTOCOL}://${KEYSTONE_SERVICE_HOST}:${KEYSTONE_SERVICE_PORT}/v3\""
-    else
-        _horizon_config_set $local_settings "" OPENSTACK_KEYSTONE_URL "\"${KEYSTONE_SERVICE_PROTOCOL}://${KEYSTONE_SERVICE_HOST}:${KEYSTONE_SERVICE_PORT}/v2.0\""
-    fi
+    _horizon_config_set $local_settings "" OPENSTACK_API_VERSIONS {\"identity\":3}
+    _horizon_config_set $local_settings "" OPENSTACK_KEYSTONE_URL "\"${KEYSTONE_SERVICE_PROTOCOL}://${KEYSTONE_SERVICE_HOST}:${KEYSTONE_SERVICE_PORT}/v3\""
 
     if [ -f $SSL_BUNDLE_FILE ]; then
         _horizon_config_set $local_settings "" OPENSTACK_SSL_CACERT \"${SSL_BUNDLE_FILE}\"