VOL-2056 Unit tests cannot be run while kind-voltha is running

Change-Id: I658636703abd93e6df04328bb09c57a6ba40bf00
diff --git a/vendor/github.com/phayes/freeport/.gitignore b/vendor/github.com/phayes/freeport/.gitignore
new file mode 100644
index 0000000..1521c8b
--- /dev/null
+++ b/vendor/github.com/phayes/freeport/.gitignore
@@ -0,0 +1 @@
+dist