Docker image for mn-stratum-siab

Modified version of mn-stratum container to add:
- DHCP server dependency
- PPPoE server depencency
- PPPoE server configuration files for SiaB
- bridge-utils dependency

Change-Id: I3e351def440c697f474ee1f26e72fc4b20df516a
diff --git a/.gitreview b/.gitreview
new file mode 100644
index 0000000..35e8480
--- /dev/null
+++ b/.gitreview
@@ -0,0 +1,5 @@
+[gerrit]
+host=gerrit.opencord.org
+port=29418
+project=mn-stratum-siab.git
+defaultremote=origin