Revert "Disable enforcing scopes in Neutron temporary"

This reverts commit be7b5bf671b4cdc082fb9b7bb73ec55cab0054dd.

As related bug is fixed, lets enabled scope enforcement in Neutron
again.

Related-bug: #1959196
Change-Id: I72db7ef533e78a10734d105e6a0debef288e41a1
diff --git a/.zuul.yaml b/.zuul.yaml
index 5a58d74..248a56b 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -619,9 +619,7 @@
         # Keep enabeling the services here to run with system scope
         CINDER_ENFORCE_SCOPE: true
         GLANCE_ENFORCE_SCOPE: true
-        # TODO(slaweq): Enable enforce scopes in Neutron when bug
-        # https://bugs.launchpad.net/neutron/+bug/1959196 will be fixed
-        # NEUTRON_ENFORCE_SCOPE: true
+        NEUTRON_ENFORCE_SCOPE: true
 
 - job:
     name: devstack-multinode