Fix Haskell timeout-cputime test

[wil93]

This PR should (hopefully) fix the error in the Travis logs

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This change is 

[andreyv]

Looks like the test now fails even with the old Ubuntu version.

[wil93]

Yeah 😕 we're looking into it

[andreyv]

FWIW, I can't reproduce the failure on a local Ubuntu 18.04 installation. I'll continue later on my side.

I noticed that the program maps 1 TB of virtual memory, which may (or may not) be relevant.

[codecov]

Codecov Report

Merging #1162 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1162      +/-   ##
==========================================
- Coverage   61.99%   61.97%   -0.03%     
==========================================
  Files         230      230              
  Lines       16604    16604              
==========================================
- Hits        10294    10290       -4     
- Misses       6310     6314       +4     

Flag	Coverage Δ
#functionaltests	45.69% <ø> (+0.10%)	⬆️
#unittests	43.29% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cms/service/ProxyService.py	57.44% <0.00%> (-1.60%)	⬇️
cms/grading/scoring.py	75.58% <0.00%> (-1.17%)	⬇️
cms/db/base.py	82.97% <0.00%> (-1.07%)	⬇️
cms/service/EvaluationService.py	66.48% <0.00%> (-1.07%)	⬇️
cms/server/admin/handlers/base.py	66.77% <0.00%> (-1.02%)	⬇️
cms/io/rpc.py	90.44% <0.00%> (-0.69%)	⬇️
cms/service/esoperations.py	78.72% <0.00%> (ø)
cms/db/filecacher.py	77.37% <0.00%> (+0.32%)	⬆️
cms/service/workerpool.py	62.22% <0.00%> (+0.55%)	⬆️
cms/grading/Sandbox.py	68.59% <0.00%> (+0.72%)	⬆️
... and 2 more

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[wil93]

It should work now! I rebased the right commit on top of master.

[andreyv]

Thanks :) Now it also works with Ubuntu 18.04.

[andreyv]

Merged in fe15f91.