VOL-1967 move api-server to separate repository

Current with voltha-go acf0adaf2d91ae72b55192cc8a939e0485918d16

Change-Id: I000ea6be0789e20c922bd671562b58a7120892ae
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..97ade15
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+2.2.0-dev