VOL-381 add unum container to support ONOS cluster formation under swarm

Change-Id: Ic260edda19bb199ed040f05164ab605f28c919d0
diff --git a/unum/vendor/golang.org/x/net/http2/Makefile b/unum/vendor/golang.org/x/net/http2/Makefile
new file mode 100644
index 0000000..55fd826
--- /dev/null
+++ b/unum/vendor/golang.org/x/net/http2/Makefile
@@ -0,0 +1,3 @@
+curlimage:
+	docker build -t gohttp2/curl .
+