Move date_utils to common/djangoapps/util

lms/templates/courseware/accordion.html

@@ -1,6 +1,6 @@
 <%!
     from django.core.urlresolvers import reverse
-    from xmodule.util.date_utils import get_time_display
+    from util.date_utils import get_time_display
     from django.utils.translation import ugettext as _
     from django.conf import settings
 %>

lms/templates/courseware/progress.html

@@ -17,7 +17,7 @@
 %>
 
 <%!
-from xmodule.util.date_utils import get_time_display
+from util.date_utils import get_time_display
 from django.conf import settings
 %>
 

lms/templates/folditbasic.html

@@ -1,7 +1,7 @@
 <%! from django.utils.translation import ugettext as _ %>
 
 <%!
-from xmodule.util.date_utils import get_default_time_display
+from util.date_utils import get_default_time_display
 %>
 <div class="folditbasic">
 <p><strong>${_("Due:")}</strong> ${get_default_time_display(due)}