CORD-2741 implement VERSION file discovery for xos python libraries

Change-Id: Ife67b0066d5fd54958e1b1de3c5b3758ac9d3ca6
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..519af9a
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+6.0.0.dev