Add uri in Plan yaml response

We now return the plan uri in the response of Plan on POST/PUT/GET methods,
so when the CLI does "solum app create plan.yaml" the uri field can be filled.

Closes-bug: #1331526
Change-Id: I86777c18010f356526656d13ce7798d092e0c815

solum/tests/api/v1/test_plan.py

@@ -13,6 +13,7 @@
 # under the License.
 
 import mock
+import pecan
 import yaml
 
 from solum.api.controllers.v1.datamodel import plan as planmodel
@@ -31,6 +32,12 @@ class TestPlanController(base.BaseTestCase):
         super(TestPlanController, self).setUp()
         objects.load()
 
+    def test_yaml_content(self, PlanHandler, resp_mock, request_mock):
+        m = fakes.FakePlan()
+        ref_content = plan.yaml_content(m)
+        self.assertEqual(ref_content['uri'], '%s/v1/plans/%s' %
+                                             (pecan.request.host_url, m.uuid))
+
     def test_plan_get(self, PlanHandler, resp_mock, request_mock):
         hand_get = PlanHandler.return_value.get
         fake_plan = fakes.FakePlan()