Ensure Rietveld superuser creation errors are reported

[matze]

When resource Exec['set_superuser'] from class rietveld fails, it does not trigger a Puppet error. This is caused by using manage.py shell, and can easily be reproduced with the following example:

$ echo "raise Exception()" | ./manage.py shell; echo "STATUS: $?"

The output is something like the following:

Python 2.7.3 (default, Feb 27 2014, 19:58:35) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
Exception

>>> >>> STATUS: 0

(Actually, it would be better to use something like ./manage.py createsuperuser ... in the first place. But as far as I remember this does not allow specifying the password, not even via /dev/stdin. Still, it's worth a try.)

[matze]

Update: Rather than fixing the Exec resource, we can use a simple database fixture after #2186 has been implemented.

[matze]

​https://hg.adblockplus.org/infrastructure/rev/223211695d67