Shadow more nodesets

Change-Id: I47b2242bdf880a1091f1f88fd6a35afd9ffabd21
diff --git a/zuul.d/sp-aaa-shadow.yaml b/zuul.d/sp-aaa-shadow.yaml
index b4f3dfa..ccd2684 100644
--- a/zuul.d/sp-aaa-shadow.yaml
+++ b/zuul.d/sp-aaa-shadow.yaml
@@ -218,6 +218,26 @@
           - controller
 
 - nodeset:
+    name: legacy-ubuntu-bionic
+    nodes:
+      name: controller
+      label: centos-base
+    groups:
+      - name: tempest
+        nodes:
+          - controller
+
+- nodeset:
+    name: legacy-ubuntu-xenial
+    nodes:
+      name: controller
+      label: centos-base
+    groups:
+      - name: tempest
+        nodes:
+          - controller
+
+- nodeset:
     name: openstack-single-node
     nodes:
       name: controller