Increase delta to make test more likely to pass on ci

Jenkins semi-regularly fails these tests because the times end up just
outside the delta. The tests are for making sure that the fields get
auto updated. It doesn't really matter a whole lot if the delta
is minute or not.
Handle {foo} Python formatting syntax.
Remove more of old mobile leftovers.
[bug 833316] Use stockchart for CTR kpi graph.
[Bug 582903] Sort question tags alphabetically.
Use my_tags property on answers page as well.
[bug 837519] Don't index top level /<locale>/forums
Remove extra line to make robots.txt validator happy.
[bug 837112] Fix crash id linking
[bug 837515] Don't complete closing tags and curly brackets in editor
[bug 832787] Add Firefox 20, hide Firefox 16.
Enable extraction for the AAQ code.
[bug 830753] Add Refine and Focus A/B test (Google Content Experiment).
[bug 826792] Track article votes in Google Analytics.
[bug 826787] Track answer votes in Google Analytics.
Remove unused js.

I grepped for email-subscribe-link and found nothing.
Add link to email chapter in advanced install
[bug #827649] l10n email templates for users and questions

* add the .ltxt domain so email template strings get extracted.

  this only affects jinja templates. the ones that are still
  django templates fail silently during extraction and never make
  it to the .pot file which is fine.

* convert users app and questions app emails from Django to Jinja
  with the exception of apps/users/templates/users/emails/pw_reset.ltxt
  because that template is rendered by Django's PasswordResetForm
  and thus it has to be a Django template until we change Kitsune
  so that jingo overrides the Django templating stuff.

* add required unsubscribe_text macro.

* fix question and answer model makers to create a user with a
  profile.

* create new sumo.email_utils library which simplifies dealing with
  email templates.

* fix all the places in the users and questions apps where we were
  rendering email templates using Django things to use Jingo things
  and use the correct locale.
[bug 804156] Mobile private messaging