FELIX-4192 : SCR Generator fails with a NPE in case a class level Reference doesn't define a referenceInterface. Add test cases from Daniel Kuffner

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1513731 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/scrplugin/generator/src/test/java/testComponents/SimpleComponent.java b/scrplugin/generator/src/test/java/testComponents/SimpleComponent.java
new file mode 100644
index 0000000..a093198
--- /dev/null
+++ b/scrplugin/generator/src/test/java/testComponents/SimpleComponent.java
@@ -0,0 +1,25 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+package testComponents;
+
+import org.apache.felix.scr.annotations.Component;
+
+@Component
+public class SimpleComponent {
+}