VOL-1868 move simulated onu from voltha-go to voltha-simonu-adapter

Sourced from voltha-go commit 251a11c0ffe60512318a644cd6ce0dc4e12f4018

Change-Id: Iab179bc2f3dd772ed7f488d1c03d1a84ba75e874
diff --git a/vendor/go.uber.org/atomic/.gitignore b/vendor/go.uber.org/atomic/.gitignore
new file mode 100644
index 0000000..0a4504f
--- /dev/null
+++ b/vendor/go.uber.org/atomic/.gitignore
@@ -0,0 +1,11 @@
+.DS_Store
+/vendor
+/cover
+cover.out
+lint.log
+
+# Binaries
+*.test
+
+# Profiling output
+*.prof