[ATMOSPHERE-492] chore: Bump neutron to 0.3.47 (#2005)

This is an automated cherry-pick of #1957
/assign ricolin
Depends-On: #2028
diff --git a/roles/tempest/vars/main.yml b/roles/tempest/vars/main.yml
index 39eb4245..ea508f9 100644
--- a/roles/tempest/vars/main.yml
+++ b/roles/tempest/vars/main.yml
@@ -190,3 +190,5 @@
             - tag
             - trunk
             - trunk-details
+            - vpnaas
+            - vpn-endpoint-groups