[CORD-3100] Refactoring and documenting the ONOS Service

Change-Id: Ida83935798a2a99b538f6ccdc55cc26f3148ffe3
diff --git a/samples/service.yaml b/samples/service.yaml
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+++ b/samples/service.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.
+
+# curl -H "xos-username: admin@opencord.org" -H "xos-password: letmein" -X POST --data-binary @service.yaml http://192.168.99.100:30007/run
+
+tosca_definitions_version: tosca_simple_yaml_1_0
+imports:
+  - custom_types/onosservice.yaml
+  - custom_types/serviceattribute.yaml
+description: Configures fabric switches and related ports
+topology_template:
+  node_templates:
+    service#onos:
+      type: tosca.nodes.ONOSService
+      properties:
+        name: onos
+        rest_hostname: onos-fabric-ui
+        rest_port: 8181
+
+
+    # ONOS Configuration
+    driver:
+      type: tosca.nodes.ServiceAttribute
+      properties:
+        name: /onos/v1/network/configuration/devices/of:1234
+        value: >
+          {
+            "basic": {
+              "driver": "mydriver"
+            }
+          }
+      requirements:
+        - service:
+            node: service#onos
+            relationship: tosca.relationships.BelongsToOne
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