VOL-1613 VERSION file on voltha-go

Change-Id: I34aae02e99f9e5421fa4f505d7a646f16314bf6a
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..340db23
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+2.0.0-dev0