Fix eoftest to run all tests from a JSON file

[pdobacz]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.12%. Comparing base (17ec114) to head (28c7a54).

❗ Current head 28c7a54 differs from pull request most recent head 5d77ab7

Please upload reports for the commit 5d77ab7 to get more accurate results.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #935   +/-   ##
=======================================
  Coverage   95.12%   95.12%           
=======================================
  Files         140      140           
  Lines       15885    15888    +3     
=======================================
+ Hits        15110    15113    +3     
  Misses        775      775           

Flag	Coverage Δ
eof_execution_spec_tests	16.60% <100.00%> (+0.24%)	⬆️
ethereum_tests	26.91% <100.00%> (+0.03%)	⬆️
ethereum_tests_silkpre	18.35% <0.00%> (-0.01%)	⬇️
execution_spec_tests	17.82% <0.00%> (-0.01%)	⬇️
unittests	90.27% <100.00%> (+<0.01%)	⬆️

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Files	Coverage Δ
test/eoftest/eoftest_runner.cpp	87.50% <100.00%> (+2.65%)	⬆️

... and 1 file with indirect coverage changes

[chfast]

This bumps eof.cpp coverage via EOF/EEST tests from ~74% to ~80%.