Add support for metadata on robot accounts

Fixes https://jira.coreos.com/browse/QUAY-847
Fixes https://jira.coreos.com/browse/QUAY-816

endpoints/api/test/test_robot.py

@@ -0,0 +1,38 @@
+import pytest
+import json
+
+from data import model
+from endpoints.api import api
+from endpoints.api.test.shared import conduct_api_call
+from endpoints.api.robot import UserRobot, OrgRobot
+from endpoints.test.shared import client_with_identity
+
+from test.test_ldap import mock_ldap
+
+from test.fixtures import *
+
+@pytest.mark.parametrize('endpoint', [
+  UserRobot,
+  OrgRobot,
+])
+@pytest.mark.parametrize('body', [
+  {},
+  {'description': 'this is a description'},
+  {'unstructured_metadata': {'foo': 'bar'}},
+  {'description': 'this is a description', 'unstructured_metadata': {'foo': 'bar'}},
+])
+def test_create_robot_with_metadata(endpoint, body, client):
+  with client_with_identity('devtable', client) as cl:
+    # Create the robot with the specified body.
+    conduct_api_call(cl, endpoint, 'PUT', {'orgname': 'buynlarge', 'robot_shortname': 'somebot'},
+                     body, expected_code=201)
+
+    # Ensure the create succeeded.
+    resp = conduct_api_call(cl, endpoint, 'GET', {
+      'orgname': 'buynlarge',
+      'robot_shortname': 'somebot',
+    })
+
+    body = body or {}
+    assert resp.json['description'] == (body.get('description') or '')
+    assert resp.json['unstructured_metadata'] == (body.get('unstructured_metadata') or {})