we don't want to use the old statistics endpoints any more
also a couple of quality of life changes
* moves some logic out of the _totals.html template
* tidies up statistics_utils
Python 3.5 introduced the ability to do unpacking before keyword
arguments, eg
```
my_method(**dictionary, foo=bar)
```
This was introduced in https://www.python.org/dev/peps/pep-0448/
This is not valid syntax in Python 3.4, which is what’s running on our
boxes.
This commit changes an instance of this syntax which was introduced in
56d9c29e91
> When we have jobs that have over 3% failure rates we should highlight
> those so that peoples attention is drawn to deal with the failure.
>
> They would then go to the job view to see what the details are where
> they could filter by failure, but that's a different story...
>
> This is just about calculating and highlighting those that need their
> attention.
— https://www.pivotaltracker.com/story/show/121206123
This commit:
- calculates the failure rate for each job
- makes jobs with a failure rate of > 3% go red on the dashboard
We can filter notifications on the activity page by state.
This commit adds counts to those filters.
This is mainly so that we can consistently do the same thing on the job
page later on.
