Bumping version of YANG Tools to 2.1; adding YANG smoke STC test.

Change-Id: I8bd719351a5dbe6af286779fdc3ac3105c2bbc62
diff --git a/lib/deps.json b/lib/deps.json
index 8d1d463..a365106 100644
--- a/lib/deps.json
+++ b/lib/deps.json
@@ -214,12 +214,12 @@
     "onos-yang-datamodel": "mvn:org.onosproject:onos-yang-datamodel:1.11",
     "onos-yang-maven-plugin": "mvn:org.onosproject:onos-yang-maven-plugin:1.11",
     "onos-yang-utils-generator": "mvn:org.onosproject:onos-yang-utils-generator:1.11",
-    "onos-yang-model":"mvn:org.onosproject:onos-yang-model:1.12.0-b8",
-    "onos-yang-compiler-api":"mvn:org.onosproject:onos-yang-compiler-api:1.12.0-b8",
-    "onos-yang-runtime":"mvn:org.onosproject:onos-yang-runtime:1.12.0-b8",
-    "onos-yang-serializers-json":"mvn:org.onosproject:onos-yang-serializers-json:1.12.0-b8",
-    "onos-yang-serializers-xml":"mvn:org.onosproject:onos-yang-serializers-xml:1.12.0-b8",
-    "onos-yang-serializers-utils":"mvn:org.onosproject:onos-yang-serializers-utils:1.12.0-b8",
+    "onos-yang-model":"mvn:org.onosproject:onos-yang-model:2.1",
+    "onos-yang-compiler-api":"mvn:org.onosproject:onos-yang-compiler-api:2.1",
+    "onos-yang-runtime":"mvn:org.onosproject:onos-yang-runtime:2.1",
+    "onos-yang-serializers-json":"mvn:org.onosproject:onos-yang-serializers-json:2.1",
+    "onos-yang-serializers-xml":"mvn:org.onosproject:onos-yang-serializers-xml:2.1",
+    "onos-yang-serializers-utils":"mvn:org.onosproject:onos-yang-serializers-utils:2.1",
     "org.apache.servicemix.bundles.dom4j":"mvn:org.apache.servicemix.bundles:org.apache.servicemix.bundles.dom4j:1.6.1_5",
     "openflowj-3.0": {
       "uri": "mvn:org.projectfloodlight:openflowj:3.0.0-SNAPSHOT",