[ONOS-7882] Updating Yang Tools to 2.6.1 to address JSON serialization issue

Change-Id: I88148bf1c3dc4c38ad8c6d9f3abf0fe5aab0026a
diff --git a/lib/deps.json b/lib/deps.json
index bcec26c..c9790ed 100644
--- a/lib/deps.json
+++ b/lib/deps.json
@@ -319,13 +319,13 @@
     "msg-simple": "mvn:com.github.fge:msg-simple:1.1",
     "snakeyaml": "mvn:org.yaml:snakeyaml:1.15",
 
-    "onos-yang-model":"mvn:org.onosproject:onos-yang-model:2.6",
-    "onos-yang-compiler-api":"mvn:org.onosproject:onos-yang-compiler-api:2.6",
-    "onos-yang-compiler-main":"mvn:org.onosproject:onos-yang-compiler-main:2.6",
+    "onos-yang-model":"mvn:org.onosproject:onos-yang-model:2.6.1",
+    "onos-yang-compiler-api":"mvn:org.onosproject:onos-yang-compiler-api:2.6.1",
+    "onos-yang-compiler-main":"mvn:org.onosproject:onos-yang-compiler-main:2.6.1",
     "onos-yang-runtime":"mvn:org.onosproject:onos-yang-runtime:2.6",
-    "onos-yang-serializers-json":"mvn:org.onosproject:onos-yang-serializers-json:2.6",
-    "onos-yang-serializers-xml":"mvn:org.onosproject:onos-yang-serializers-xml:2.6",
-    "onos-yang-serializers-utils":"mvn:org.onosproject:onos-yang-serializers-utils:2.6",
+    "onos-yang-serializers-json":"mvn:org.onosproject:onos-yang-serializers-json:2.6.1",
+    "onos-yang-serializers-xml":"mvn:org.onosproject:onos-yang-serializers-xml:2.6.1",
+    "onos-yang-serializers-utils":"mvn:org.onosproject:onos-yang-serializers-utils:2.6.1",
 
     "org.apache.servicemix.bundles.dom4j":"mvn:org.apache.servicemix.bundles:org.apache.servicemix.bundles.dom4j:1.6.1_5",
     "plexus-utils": "mvn:org.codehaus.plexus:plexus-utils:3.0.24",