Bump onos-yang-utils to version 2.2.0

Change-Id: I53fae36d21278ba67224a9044e83063f2b6e1f82
(cherry picked from commit e9019321ac484f6ab65aaaaf72788da33663067d)
diff --git a/tools/dev/bin/patch-yang-libs b/tools/dev/bin/patch-yang-libs
index 89ebeb6..0522d9e 100755
--- a/tools/dev/bin/patch-yang-libs
+++ b/tools/dev/bin/patch-yang-libs
@@ -3,8 +3,8 @@
 # Patches lib/BUCK file to use locally built YANG tools.
 # -----------------------------------------------------------------------------
 
-BVER=2.2.0-b6
-SVER=2.2-SNAPSHOT
+BVER=2.2.0
+SVER=2.3-SNAPSHOT
 
 YANG_TOOLS_ROOT=${YANG_TOOLS_ROOT:-~/onos-yang-tools}