[CORD-3100] Refactoring and documenting the ONOS Service

Change-Id: Ida83935798a2a99b538f6ccdc55cc26f3148ffe3
diff --git a/samples/apps.yaml b/samples/apps.yaml
new file mode 100644
index 0000000..d923788
--- /dev/null
+++ b/samples/apps.yaml
@@ -0,0 +1,69 @@
+# 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 @apps.yaml http://192.168.99.100:30007/run
+
+tosca_definitions_version: tosca_simple_yaml_1_0
+imports:
+  - custom_types/onosapp.yaml
+  - custom_types/onosservice.yaml
+  - custom_types/serviceinstanceattribute.yaml
+description: Configures fabric switches and related ports
+topology_template:
+  node_templates:
+    service#onos:
+      type: tosca.nodes.ONOSService
+      properties:
+        name: onos
+        must-exist: true
+
+
+    # Local app
+    dhcp:
+      type: tosca.nodes.ONOSApp
+      properties:
+        name: dhcp
+        app_id: org.onosproject.dhcp
+      requirements:
+        - owner:
+            node: service#onos
+            relationship: tosca.relationships.BelongsToOne
+
+    # Remote app
+    cord-config:
+      type: tosca.nodes.ONOSApp
+      properties:
+        name: cord-config
+        url: https://oss.sonatype.org/content/repositories/public/org/opencord/cord-config/1.4.0-SNAPSHOT/cord-config-1.4.0-20180604.071543-275.oar
+        version: 1.4.0.SNAPSHOT
+      requirements:
+        - owner:
+            node: service#onos
+            relationship: tosca.relationships.BelongsToOne
+
+    # CORD-Configuration
+    cord-config-attr:
+      type: tosca.nodes.ServiceInstanceAttribute
+      properties:
+        name: /onos/v1/network/configuration/apps/org.opencord.olt
+        value: >
+          {
+            "kafka" : {
+              "bootstrapServers" : "cord-kafka-kafka.default.svc.cluster.local:9092"
+            }
+          }
+      requirements:
+        - service_instance:
+            node: cord-config
+            relationship: tosca.relationships.BelongsToOne
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