Adding a test scenario for STC unit tests.

Change-Id: I1bf2b84ac1af1524e9dc7e60c930087e87619406

+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<scenario name="basic">
+    <step name="a"/>
+    <step name="b" requires="a"/>
+    <step name="f" requires="b"/>
+    <group name="g">
+        <step name="c"/>
+        <step name="d" requires="c"/>
+        <step name="e" requires="d"/>
+    </group>
+</scenario>
\ No newline at end of file