in the case of a bad benchmark config exit with error. benchmark config utf-8 reading

[filipecosta90]

No description provided.

[codecov-commenter]

Codecov Report

Merging #293 (78cf740) into master (5e074bc) will increase coverage by 0.05%.
The diff coverage is 58.33%.

@@            Coverage Diff             @@
##           master     #293      +/-   ##
==========================================
+ Coverage   54.61%   54.66%   +0.05%     
==========================================
  Files          54       54              
  Lines        4008     4017       +9     
==========================================
+ Hits         2189     2196       +7     
- Misses       1819     1821       +2     

Impacted Files	Coverage Δ
redisbench_admin/run_local/run_local.py	82.51% <ø> (ø)
redisbench_admin/run_remote/run_remote.py	22.04% <0.00%> (-0.45%)	⬇️
redisbench_admin/run/args.py	100.00% <100.00%> (ø)
redisbench_admin/utils/benchmark_config.py	77.88% <100.00%> (+0.20%)	⬆️
redisbench_admin/run/git.py	96.42% <0.00%> (ø)
redisbench_admin/utils/remote.py	68.57% <0.00%> (+0.77%)	⬆️

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