fix sudo pwd prompt in quicksetup

[DropD]

Was broken by running the command in a new process group, as detailed in #1535.

[codecov-io]

Codecov Report

Merging #1734 into develop will decrease coverage by 0.02%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop    #1734      +/-   ##
===========================================
- Coverage    57.16%   57.13%   -0.03%     
===========================================
  Files          275      275              
  Lines        33912    33912              
===========================================
- Hits         19386    19377       -9     
- Misses       14526    14535       +9

Impacted Files	Coverage Δ
aiida/control/postgres.py	90.9% <100%> (ø)	⬆️
aiida/backends/djsite/globalsettings.py	81.57% <0%> (-5.27%)	⬇️
aiida/backends/djsite/db/models.py	75.09% <0%> (-0.89%)	⬇️

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[giovannipizzi]

I imagine there is no simple way to test this, right?
Just to make sure, was this tested at least once? If the answer is yes, then I'm ok to merge (I'm already approving this)

[DropD]

It has been tested locally. Testing it would require running it as a non-super user with no passwordless postgres rights. Next it would require interaction to either input the sudo password or terminate the process. It is not impossible, but not simple either.

…

On Fri, Jul 13, 2018, 07:55 Giovanni Pizzi ***@***.***> wrote: ***@***.**** approved this pull request. I imagine there is no simple way to test this, right? Just to make sure, was this tested at least once? If the answer is yes, then I'm ok to merge (I'm already approving this) — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1734 (review)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABMqBKlRqrdsQe6UGWd_mjd4rQx1HWVrks5uGDZegaJpZM4VH3fE> .