VOL-1967 move api-server to separate repository

Current with voltha-go acf0adaf2d91ae72b55192cc8a939e0485918d16

Change-Id: I000ea6be0789e20c922bd671562b58a7120892ae
diff --git a/vendor/github.com/petar/GoLLRB/AUTHORS b/vendor/github.com/petar/GoLLRB/AUTHORS
new file mode 100644
index 0000000..78d1de4
--- /dev/null
+++ b/vendor/github.com/petar/GoLLRB/AUTHORS
@@ -0,0 +1,4 @@
+Petar Maymounkov <petar@5ttt.org>
+Vadim Vygonets <vadik@vygo.net>
+Ian Smith <iansmith@acm.org>
+Martin Bruse