[VOL-2260] Guard Openolt against Wrong Tech Profile configuration

Added checks to prevent crashing of Openolt container in case of
invalid values of SchedulingPolicy, Direction, AdditionalBW and
DiscardPolicy attributes in Technology Profile json.

Change-Id: I94bca248908feab9e3a94bf2c25c0d10a8bf152a
diff --git a/VERSION b/VERSION
index eae4a66..8061d26 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.21
+2.2.22-dev