add in unit testing pipeline step

Change-Id: Ib6ac50cb91bbdd6e7ac35c8e39a2072a0731b332
diff --git a/Jenkinsfile b/Jenkinsfile
index 1fc3c85..454e3b7 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -12,4 +12,13 @@
             }
         }
     }
+    stage('unit-test') {
+        steps {
+            sh '''#!/bin/bash -l
+            ONOS_ROOT=`pwd`
+            source tools/build/envDefaults
+            onos-buck test
+            '''
+    }
+
 }