Upgrade ONOS to use 2.3.0-b2 version of the yang tools

Change-Id: I1111958d4d172320a00d595c20ff82a385a4be3e
diff --git a/tools/build/onos-buck b/tools/build/onos-buck
index 6830b1d..cb624db 100755
--- a/tools/build/onos-buck
+++ b/tools/build/onos-buck
@@ -5,8 +5,8 @@
 
 set -e
 
-BUCK_URL="http://onlab.vicci.org/onos/third-party/buck-v2017.10.03.02.zip"
-BUCK_SHA="c82bfa67b18e3acd3a3ec278be1549856cb74d3b"
+BUCK_URL="http://onlab.vicci.org/onos/third-party/buck-v2017.10.17.01.zip"
+BUCK_SHA="567949ed0a68b40095d692839ff3321cde5cc5cc"
 
 [  "-U" = "$1" ] && shift && FORCE_UPDATE=True