Add example delete

Example delete command gets used like:
    python -m examples.delete openstack/network/v2_0/network.py \
           --data '{"id": "a1369557-748f-429c-bd3e-fc385aacaec7"}'

Change-Id: I03211b1e8f9c9efeb47c517d7e597acb8e7d6f59

examples/delete.py

@@ -0,0 +1,31 @@
+# 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.
+
+import sys
+
+from examples import common
+from examples import session
+
+
+def run_delete(opts):
+    sess = session.make_session(opts)
+    cls = common.find_resource_cls(opts)
+    data = common.get_data_option(opts)
+    obj = cls.new(**data)
+    obj.delete(sess)
+    print('Deleted: %s' % str(data))
+    return
+
+
+if __name__ == "__main__":
+    opts = common.setup()
+    sys.exit(common.main(opts, run_delete))