Refactored some of the classes in tests.py to not unnecessarily depend on the XML modulestore.

Conflicts:
	lms/djangoapps/courseware/tests/test_navigation.py
	lms/djangoapps/courseware/tests/test_view_authentication.py
	lms/djangoapps/courseware/tests/tests.py

common/lib/xmodule/xmodule/modulestore/tests/factories.py

@@ -1,12 +1,13 @@
 from factory import Factory, lazy_attribute_sequence, lazy_attribute
 from uuid import uuid4
+import datetime
+
 from xmodule.modulestore import Location
 from xmodule.modulestore.django import modulestore
 from xmodule.modulestore.inheritance import own_metadata
 from xmodule.x_module import ModuleSystem
 from mitxmako.shortcuts import render_to_string
 from xblock.runtime import InvalidScopeError
-import datetime
 from pytz import UTC
 
 
@@ -149,6 +150,8 @@ class XModuleItemFactory(Factory):
         if new_item.location.category not in DETACHED_CATEGORIES:
             store.update_children(parent_location, parent.children + [new_item.location.url()])
 
+        new_item = store.get_item(new_item.location)
+
         return new_item