fix benchmark exit status

[jnke2016]

Fix exit status

[codecov-commenter]

Codecov Report

Merging #1850 (d253e96) into branch-21.10 (c41ffd4) will increase coverage by 66.20%.
The diff coverage is n/a.

❗ Current head d253e96 differs from pull request most recent head e4d3cb7. Consider uploading reports for the commit e4d3cb7 to get more accurate results

@@                Coverage Diff                @@
##           branch-21.10    #1850       +/-   ##
=================================================
+ Coverage          3.97%   70.18%   +66.20%     
=================================================
  Files                 6      143      +137     
  Lines               377     8861     +8484     
=================================================
+ Hits                 15     6219     +6204     
- Misses              362     2642     +2280     

Impacted Files	Coverage Δ
...thon/cugraph/cugraph/linear_assignment/__init__.py	100.00% <0.00%> (ø)
...thon/cugraph/cugraph/tree/minimum_spanning_tree.py	85.36% <0.00%> (ø)
python/cugraph/cugraph/cores/__init__.py	100.00% <0.00%> (ø)
python/cugraph/cugraph/community/egonet.py	92.30% <0.00%> (ø)
python/cugraph/cugraph/tests/test_sorensen.py	98.31% <0.00%> (ø)
python/cugraph/cugraph/sampling/random_walks.py	93.10% <0.00%> (ø)
python/cugraph/cugraph/tests/test_symmetrize.py	66.66% <0.00%> (ø)
python/cugraph/cugraph/structure/shuffle.py	10.86% <0.00%> (ø)
...n/cugraph/cugraph/community/subgraph_extraction.py	95.23% <0.00%> (ø)
python/cugraph/cugraph/tests/test_nx_convert.py	100.00% <0.00%> (ø)
... and 130 more

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[rlratzel]

@gpucibot merge