Fix issue #3728 ParseProblemException

[jlerbsc]

Fixes #3728 . VarType must not be detected on the context of a ClassExpr.
Note : The VarType is detected in the Java10 post processor versus the parser grammar.

[codecov]

Codecov Report

Merging #3743 (7b0123e) into master (99507dc) will increase coverage by 0.008%.
The diff coverage is 90.000%.

@@               Coverage Diff               @@
##              master     #3743       +/-   ##
===============================================
+ Coverage     57.305%   57.313%   +0.008%     
  Complexity      2671      2671               
===============================================
  Files            635       635               
  Lines          33559     33566        +7     
  Branches        5787      5790        +3     
===============================================
+ Hits           19231     19238        +7     
  Misses         12275     12275               
  Partials        2053      2053               

Flag	Coverage Δ
AlsoSlowTests	57.313% <90.000%> (+0.008%)	⬆️
javaparser-core	52.460% <90.000%> (+0.009%)	⬆️
javaparser-symbol-solver	36.730% <70.000%> (+0.007%)	⬆️
jdk-10	57.309% <90.000%> (+0.023%)	⬆️
jdk-11	57.309% <90.000%> (+0.020%)	⬆️
jdk-12	57.306% <90.000%> (+0.020%)	⬆️
jdk-13	57.309% <90.000%> (?)
jdk-14	57.303% <90.000%> (+0.017%)	⬆️
jdk-15	57.306% <90.000%> (+0.005%)	⬆️
jdk-16	57.303% <90.000%> (+0.017%)	⬆️
jdk-8	57.305% <90.000%> (+0.002%)	⬆️
jdk-9	57.303% <90.000%> (+0.002%)	⬆️
macos-latest	57.302% <90.000%> (+0.005%)	⬆️
ubuntu-latest	57.299% <90.000%> (?)
windows-latest	57.293% <90.000%> (+0.005%)	⬆️

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Impacted Files	Coverage Δ
.../validator/postprocessors/Java10PostProcessor.java	94.444% <90.000%> (-5.556%)	⬇️
...ava/com/github/javaparser/ParserConfiguration.java	90.298% <0.000%> (+0.746%)	⬆️

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