Merge pull request #12919 from edx/ned/make-messages-the-same

Make this message the same as another almost identical message

lms/templates/courseware/error-message.html

 <%! from django.utils.translation import ugettext as _ %>
 <%
-    link_to_support_email='<a href=\"mailto:{tech_support_email}\">{tech_support_email}</a>'.format(tech_support_email=settings.TECH_SUPPORT_EMAIL)
+    tech_support_email='<a href=\"mailto:{tech_support_email}\">{tech_support_email}</a>'.format(tech_support_email=settings.TECH_SUPPORT_EMAIL)
 %>
-<p>${_("We're sorry, this module is temporarily unavailable. Our staff is working to fix it as soon as possible. Please email us at {link_to_support_email} to report any problems or downtime.").format(link_to_support_email=link_to_support_email)}</p>
+<p>${_("We're sorry, this module is temporarily unavailable. Our staff is working to fix it as soon as possible. Please email us at {tech_support_email} to report any problems or downtime.").format(tech_support_email=tech_support_email)}</p>