Fix ExceptionAdapterExtension to also handle inherited fixture methods

[leonard84]

fixes #1263

[codecov]

Codecov Report

Merging #1264 (e4d6e75) into master (9628409) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #1264      +/-   ##
============================================
+ Coverage     76.58%   76.60%   +0.02%     
  Complexity     3764     3764              
============================================
  Files           405      405              
  Lines         11464    11461       -3     
  Branches       1395     1395              
============================================
  Hits           8780     8780              
+ Misses         2201     2198       -3     
  Partials        483      483              

Impacted Files	Coverage Δ	Complexity Δ
...ockframework/junit4/ExceptionAdapterExtension.java	100.00% <100.00%> (ø)	4.00 <2.00> (-3.00)
...ava/org/spockframework/runtime/model/SpecInfo.java	90.27% <0.00%> (+2.08%)	72.00% <0.00%> (+3.00%)

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