fallback to SHUB_JOBAUTH environment variable if SH_APIKEY is not set

[victor-torres]

you can test with the command py.test tests/client/test_utils.py

I'm also adding requirements-base.txt to the requirements-test.txt file as we need some libs installed from this file to perform some tests

This fixes issue #103

[vshlapakov]

I think the general idea here is:

• when you need to simply install a package, you install everything from requirements.txt
• when you want to install test-related packages, you install it additionally, with separate pip install -r cmd

So for me it's a matter of taste and I don't see any strong reason to change it.
Do you agree or I'm missing anything else here?

[kalessin]

I also think this line is not needed. Also, it is a different discussion/feature than the one intended for this PR. I would remove it.

[vshlapakov]

I'm not convinced about the change in requirements-test.txt and would prefer to drop it.
Apart from that, LGTM, very neat changes 👍

[codecov]

Codecov Report

Merging #104 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #104      +/-   ##
==========================================
+ Coverage   93.39%   93.41%   +0.01%     
==========================================
  Files          28       28              
  Lines        1878     1883       +5     
==========================================
+ Hits         1754     1759       +5     
  Misses        124      124

Impacted Files	Coverage Δ
scrapinghub/client/utils.py	94.25% <100%> (+0.35%)	⬆️

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[victor-torres]

Great. I have removed the changes from the requirements file in order to keep the scope of this PR attached to the original discussion.

[vshlapakov]

Thanks @victor-torres!