Adds PATCH /v2/plans/:plan_uuid endpoint

This patch adds hollow PATCH /v2/plans/:plan_uuid
endpoint which returns only dummy response.
Logic to manipulate real data will be added
later.

Change-Id: Ia6b14ccc0834f833560dab2d2b188ea90dea1807
Implements: blueprint tripleo-juno-tuskar-plan-rest-api

tuskar/api/controllers/v2/plans.py

@@ -114,3 +114,23 @@ class PlansController(rest.RestController):
     @pecan.expose()
     def templates(self, plan_uuid):
         return plan_uuid
+
+    @wsme.validate(models.Plan)
+    @wsme_pecan.wsexpose(models.Plan,
+                         str,
+                         body=models.Plan,
+                         status_code=201)
+    def patch(self, plan_uuid, transfer_plan):
+        """Patches existing plan.
+
+        :param transfer_plan: data submitted by the user
+        :type  transfer_plan:
+            tuskar.api.controllers.v1.models.Plan
+
+        :return: patched plan
+        :rtype:  tuskar.api.controllers.v1.models.Plan
+        """
+        LOG.debug('Patching plan: %s' % transfer_plan)
+
+        # Package for transfer back to the user
+        return transfer_plan

tuskar/tests/api/controllers/v2/test_plans.py

@@ -86,3 +86,16 @@ class PlansTests(base.TestCase):
         # Verify
         self.assertEqual(response.status_int, 200)
         self.assertEqual(result, 'foo')
+
+    def test_patch(self):
+        # Setup
+        plan_data = {'name': 'new'}
+
+        # Test
+        url = URL_PLANS + '/' + 'qwert12345'
+        response = self.app.patch_json(url, plan_data)
+        result = response.json
+
+        # Verify
+        self.assertEqual(response.status_int, 201)
+        self.assertEqual(result['name'], plan_data['name'])