Add initial offline barbican model

Change-Id: I433a4112958928b70ef6c77da62871be67bf75b9
diff --git a/classes/cluster/virtual-offline-ssl/openstack/gateway.yml b/classes/cluster/virtual-offline-ssl/openstack/gateway.yml
new file mode 100644
index 0000000..831cc6a
--- /dev/null
+++ b/classes/cluster/virtual-offline-ssl/openstack/gateway.yml
@@ -0,0 +1,88 @@
+classes:
+- system.linux.system.repo_local.mcp.apt_mirantis.openstack
+- system.linux.system.repo_local.mcp.extra
+- system.linux.system.repo_local.mcp.apt_mirantis.saltstack_2016_3
+- system.neutron.gateway.cluster
+- cluster.virtual-offline-ssl
+parameters:
+  _param:
+    primary_interface: ens4
+    tenant_interface: ens5
+    external_interface: ens6
+    interface_mtu: 9000
+    neutron_gateway_dvr: True
+    neutron_gateway_agent_mode: dvr_snat
+    linux_system_codename: xenial
+  neutron:
+    gateway:
+      notification:
+        driver: messagingv2
+        topics: "notifications"
+  linux:
+    network:
+      bridge: openvswitch
+      interface:
+        dhcp_int:
+          enabled: true
+          name: ens3
+          proto: dhcp
+          type: eth
+          mtu: ${_param:interface_mtu}
+        primary_interface:
+          enabled: true
+          ipflush_onchange: true
+          name: ${_param:primary_interface}
+          mtu: ${_param:interface_mtu}
+          proto: manual
+          type: eth
+        tenant_interface:
+          enabled: true
+          ipflush_onchange: true
+          name: ${_param:tenant_interface}
+          mtu: ${_param:interface_mtu}
+          proto: manual
+          type: eth
+        external_interface:
+          enabled: true
+          ipflush_onchange: true
+          name: ${_param:external_interface}
+          mtu: ${_param:interface_mtu}
+          proto: manual
+          type: eth
+        br-floating:
+          enabled: true
+          type: ovs_bridge
+          mtu: ${_param:interface_mtu}
+        br-mgmt:
+          enabled: true
+          type: bridge
+          proto: static
+          address: ${_param:single_address}
+          netmask: 255.255.255.0
+          mtu: ${_param:interface_mtu}
+          use_interfaces:
+          - ${_param:primary_interface}
+        br-mesh:
+          enabled: true
+          type: bridge
+          mtu: ${_param:interface_mtu}
+          proto: static
+          address: ${_param:tenant_address}
+          netmask: 255.255.255.0
+          use_interfaces:
+          - ${_param:tenant_interface}
+        float-to-ex:
+          enabled: true
+          type: ovs_port
+          mtu: ${_param:interface_mtu}
+          bridge: br-floating
+        br-ex:
+          enabled: true
+          type: bridge
+          mtu: ${_param:interface_mtu}
+          address: ${_param:external_address}
+          netmask: 255.255.255.0
+          use_interfaces:
+          - ${_param:external_interface}
+          use_ovs_ports:
+          - float-to-ex
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