Add basic test and init of workflow

opentech/apply/tests.py

-# from django.test import TestCase
+from unittest import TestCase
 
-# Create your tests here.
+from .workflow import Workflow
+
+
+class TestWorkflowCreation(TestCase):
+    def test_can_create_workflow(self):
+        name = 'single_stage'
+        workflow = Workflow(name)
+        self.assertEqual(workflow.name, name)

opentech/apply/workflow.py

+class Workflow:
+    def __init__(self, name):
+        self.name = name