Add support for running SiaB with stratum_bmv2 as the fabric switch

- new value file (seba-ponsim-stratum.yaml) to deploy SiaB with Stratum
- new mininet script to use stratum_bmv2 instead of OVS as Fabric switch
- update to ponsim and mininet to use the new Stratum device instead of OVS

Change-Id: I35901b455865cebc0a11de8b155b951e4fa4a9f8
diff --git a/mininet/templates/mn-stratum-service.yaml b/mininet/templates/mn-stratum-service.yaml
new file mode 100644
index 0000000..0cf7d86
--- /dev/null
+++ b/mininet/templates/mn-stratum-service.yaml
@@ -0,0 +1,38 @@
+---
+# Copyright 2019-present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Service that exposes the gRPC port to control the stratum_bmv2 instance(s)
+# running inside Mininet
+
+{{- if $.Values.stratumEnabled }}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "mininet.fullname" . }}-stratum
+  namespace: {{ .Values.namespace }}
+  labels:
+    app: {{ template "mininet.name" . }}
+    chart: {{ template "mininet.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  type: ClusterIP
+  ports:
+  - name: stratum-1
+    port: 50001
+  selector:
+    app: {{ template "mininet.name" . }}
+    release: {{ .Release.Name }}
+{{- end }}