Fix enum default value generation when suffix provided #131

[kobylynskyi]

Fixes #131

[kobylynskyi]

@joffrey-bion could you please review this PR?
I know you worked initially on the class DefaultValueMapper.

[codecov]

Codecov Report

Merging #132 into master will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #132      +/-   ##
============================================
+ Coverage     90.83%   90.85%   +0.01%     
  Complexity      413      413              
============================================
  Files            49       49              
  Lines           993      995       +2     
  Branches        131      131              
============================================
+ Hits            902      904       +2     
  Misses           62       62              
  Partials         29       29              

Impacted Files	Coverage Δ	Complexity Δ
...kyi/graphql/codegen/mapper/DefaultValueMapper.java	87.50% <100.00%> (+0.65%)	21.00 <1.00> (ø)
.../mapper/InputValueDefinitionToParameterMapper.java	92.85% <100.00%> (ø)	4.00 <0.00> (ø)

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[joffrey-bion]

Great fix, sorry about this prefix/suffix issue!

[kobylynskyi]

Thanks for the fast review!