Make tests pass again again

* Move lazyproperty decorator into xmodule so it's accessible during tests
* add default xqueue to test system

common/lib/xmodule/xmodule/course_module.py

@@ -3,7 +3,7 @@ import time
 import dateutil.parser
 import logging
 
-from util.decorators import lazyproperty
+from xmodule.util.decorators import lazyproperty
 from xmodule.graders import load_grading_policy
 from xmodule.modulestore import Location
 from xmodule.seq_module import SequenceDescriptor, SequenceModule

common/lib/xmodule/xmodule/tests/__init__.py

@@ -32,7 +32,7 @@ i4xs = ModuleSystem(
     user=Mock(),
     filestore=fs.osfs.OSFS(os.path.dirname(os.path.realpath(__file__))),
     debug=True,
-    xqueue=None,
+    xqueue={'default_queuename': 'testqueue'},
     is_staff=False
 )