VOL-1867 move simulated olt from voltha-go to voltha-simolt-adapter

Sourced from voltha-go commit 251a11c0ffe60512318a644cd6ce0dc4e12f4018

Change-Id: I8e7ee4da1fed739b3c461917301d2729a79307f5
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..97ade15
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+2.2.0-dev