Backwards compatibility with older pytest

[tiran]

pytest >= 2.10 supports yield based fixtures with pytest.fixture. In pytest < 2.10 pytest.yield_fixture is required. But that function also raises a deprecation warning in pytest >= 3.0.

https://docs.pytest.org/en/latest/fixture.html#fixture-finalization-executing-teardown-code

Signed-off-by: Christian Heimes cheimes@redhat.com

[codecov-io]

Codecov Report

Merging #182 into master will decrease coverage by 0.04%. The diff coverage is 60%.

@@            Coverage Diff             @@
##           master     #182      +/-   ##
==========================================
- Coverage   77.36%   77.32%   -0.05%     
==========================================
  Files          26       26              
  Lines        2554     2558       +4     
  Branches      242      244       +2     
==========================================
+ Hits         1976     1978       +2     
- Misses        474      475       +1     
- Partials      104      105       +1

Impacted Files	Coverage Δ
tests/test_misc.py	95.55% <60%> (-4.45%)	:arrow_down:

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