Support L2GW plugin/agent

L2 Gateway (L2GW) is an API framework that offers bridging 2+
networks together to make them look as a single broadcast domain.
A typical use case is bridging the virtual with the physical networks.

Related-Prod: PROD-17614
Change-Id: I4101b94202f87da6f5ecdea75d38dde17f08ca99
diff --git a/.kitchen.yml b/.kitchen.yml
index 43f469c..0bd9fa3 100644
--- a/.kitchen.yml
+++ b/.kitchen.yml
@@ -123,6 +123,11 @@
       pillars-from-files:
         neutron.sls: tests/pillar/control_fwaas_v1.sls
 
+  - name: control_l2gw
+    provisioner:
+      pillars-from-files:
+        neutron.sls: tests/pillar/control_l2gw.sls
+
   - name: control_single
     provisioner:
       pillars-from-files:
@@ -158,6 +163,11 @@
       pillars-from-files:
         neutron.sls: tests/pillar/gateway_legacy_fwaas_v1.sls
 
+  - name: gateway_legacy_l2gw
+    provisioner:
+      pillars-from-files:
+        neutron.sls: tests/pillar/gateway_legacy_l2gw.sls
+
   - name: control_dns
     provisioner:
       pillars-from-files: