Preliminary ability to use Jinja2 {{ }} to replace ${foo.bar} in playbooks. Can't use both at the same time per line.

test/TestPlayBook.py

@@ -135,6 +135,7 @@ class TestPlaybook(unittest.TestCase):
            runner_callbacks = self.test_callbacks
        )
        result = self.playbook.run()
+       print EVENTS
        return result
 
    def test_one(self):

test/playbook1.yml

@@ -25,7 +25,7 @@
     action: command true
 
   - name: test basic shell, plus two ways to dereference a variable
-    action: shell echo $HOME $port {{ port }}
+    action: shell echo $HOME $port
 
   - name: test vars_files imports
     action: shell echo $duck $cow $testing