Replace TENANT => PROJECT phase 1

This replaces the use of TENANT variables with PROJECT ones during the
initial setup. The openrc will still export a OS_TENANT_NAME because
many tools (cinderclient, glanceclient amoung them) will not function
without it. We warn when we do that.

Change-Id: I824b1121842eb5821034071874bf1bb2d7c3631e
diff --git a/stack.sh b/stack.sh
index 6dddea4..0be3585 100755
--- a/stack.sh
+++ b/stack.sh
@@ -1210,7 +1210,7 @@
 
 # Create an access key and secret key for Nova EC2 register image
 if is_service_enabled keystone && is_service_enabled swift3 && is_service_enabled nova; then
-    eval $(openstack ec2 credentials create --user nova --project $SERVICE_TENANT_NAME -f shell -c access -c secret)
+    eval $(openstack ec2 credentials create --user nova --project $SERVICE_PROJECT_NAME -f shell -c access -c secret)
     iniset $NOVA_CONF DEFAULT s3_access_key "$access"
     iniset $NOVA_CONF DEFAULT s3_secret_key "$secret"
     iniset $NOVA_CONF DEFAULT s3_affix_tenant "True"