CORD-3028 Example Tosca to create a SimpleExampleServiceInstance

Change-Id: Id2adba59c44ed4724b278417a0bef30cccb7355f
diff --git a/xos/examples/SimpleExampleServiceInstance.yaml b/xos/examples/SimpleExampleServiceInstance.yaml
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+++ b/xos/examples/SimpleExampleServiceInstance.yaml
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+---
+# Copyright 2017-present Open Networking Foundation
+#
+# 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.
+
+tosca_definitions_version: tosca_simple_yaml_1_0
+
+description: Make a SimpleExampleServiceInstance
+
+imports:
+  - custom_types/simpleexampleservice.yaml
+  - custom_types/simpleexampleserviceinstance.yaml
+
+topology_template:
+  node_templates:
+    service#simpleexampleservice:
+      type: tosca.nodes.SimpleExampleService
+      properties:
+        name: simpleexampleservice
+        must-exist: true
+
+    simpleexampleserviceinstance:
+      type: tosca.nodes.SimpleExampleServiceInstance
+      properties:
+        name: "My Simple Example Service Instance"
+        tenant_message: "world"
+        tenant_secret: "p@ssw0rd"
+      requirements:
+        - owner:
+            node: service#simpleexampleservice
+            relationship: tosca.relationships.BelongsToOne