Fixing test failures

openedx.features.course_experience.tests.views.test_course_home.TestCourseHomePageAccess.test_home_page_5
and
openedx.features.course_experience.tests.views.test_course_home.TestCourseHomePageAccess.test_home_page_6
failed for me as a result of this format string being insufficiently
permissive

JIRA:EDUCATOR-3765 as part of getting the switch deployed

edx_when/__init__.py

@@ -4,6 +4,6 @@
 
 from __future__ import absolute_import, unicode_literals
 
-__version__ = '0.1.3'
+__version__ = '0.1.4'
 
 default_app_config = 'edx_when.apps.EdxWhenConfig'  # pylint: disable=invalid-name

edx_when/api.py

@@ -77,7 +77,7 @@ def get_dates_for_course(course_id, user=None, use_cached=True):
             user_id = user
         else:
             user_id = user.id if not user.is_anonymous else ''
-        cache_key += '.%d' % user_id
+        cache_key += '.%s' % user_id
     else:
         user_id = None
     dates = DEFAULT_REQUEST_CACHE.data.get(cache_key, None)