Replaces uuid.uuid4 with uuidutils.generate_uuid()

Openstack oslo_utils has a generate_uuid function for generating
uuids. We should use that function when generating uuids for
consistency.

Change-Id: I096069a0d8a963f325c8bfa9106c972acdbd82bf

picasso/common/persistence.py

@@ -13,7 +13,7 @@
 #    under the License.
 
 import datetime
-import uuid
+from oslo_utils import uuidutils
 
 from . import config
 
@@ -31,7 +31,7 @@ class BaseDatabaseModel(object):
         logger.debug("Attempting to create object class instance "
                      "'{}' with attributes '{}'"
                      .format(str(self.__class__), str(kwargs)))
-        self.id = uuid.uuid4().hex
+        self.id = uuidutils.generate_uuid(dashed=False)
         self.created_at = str(datetime.datetime.now())
         self.updated_at = str(datetime.datetime.now())
         for k, v in kwargs.items():

picasso/tests/fakes/functions_api.py

@@ -13,7 +13,7 @@
 #    under the License.
 
 import collections
-import uuid
+from oslo_utils import uuidutils
 
 from functionsclient import client
 from functionsclient.v1 import apps
@@ -78,7 +78,7 @@ class FakeRoutes(object):
         else:
             route = await self.show(path, loop=loop)
             return "Hello world!" if route.type == "sync" else {
-                "call_id": uuid.uuid4().hex
+                "call_id": uuidutils.generate_uuid()
             }
 
     async def update(self, route_path, loop=None, **data):

picasso/tests/functional/base.py

@@ -14,9 +14,9 @@
 
 import os
 import testtools
-import uuid
 
 from aioservice.http import service
+from oslo_utils import uuidutils
 
 from ...api.controllers import apps
 from ...api.controllers import routes
@@ -71,8 +71,8 @@ class FunctionalTestsBase(base.PicassoTestsBase, testtools.TestCase):
             functions_client=fnclient,
         )
 
-        self.project_id = str(uuid.uuid4()).replace("-", "")
-        self.other_project_id = str(uuid.uuid4()).replace("-", "")
+        self.project_id = uuidutils.generate_uuid().replace("-", "")
+        self.other_project_id = uuidutils.generate_uuid().replace("-", "")
 
         self.test_client = client.ProjectBoundTestClient(
             self.testapp, self.project_id)