scalatest FuncSuite support

[rpau]

This patch adds support for FuncSuite with the following changes:

• New agent to define for ignoring tests because when the runner loads
  the test ignorer, the class has been already loaded, which means that
  can not be changed.

• Checking if the test extends from FuncSuite

• ScalaTest creates a constructor per Test class, and inside the constructor, calls the tests.
  This patch ignores this kind of tests by replacing the method call "test" by "ignore".

[codecov]

Codecov Report

Merging #12 into master will decrease coverage by 11.14%.
The diff coverage is 39.78%.

@@              Coverage Diff              @@
##             master      #12       +/-   ##
=============================================
- Coverage     81.83%   70.69%   -11.15%     
- Complexity      128      138       +10     
=============================================
  Files            13       16        +3     
  Lines           435      546      +111     
  Branches         43       52        +9     
=============================================
+ Hits            356      386       +30     
- Misses           49      128       +79     
- Partials         30       32        +2

Impacted Files	Coverage Δ	Complexity Δ
...unit4git/core/bytecode/TestIgnorerTransformer.java	0% <0%> (ø)	0 <0> (?)
...kmod/junit4git/core/ignorers/TestIgnorerAgent.java	0% <0%> (ø)	0 <0> (?)
...g/walkmod/junit4git/core/ignorers/TestIgnorer.java	62.65% <46.8%> (-19.41%)	22 <7> (+6)
...rg/walkmod/junit4git/javassist/JavassistUtils.java	76.92% <75%> (+2.92%)	15 <4> (+4)	⬆️
...d/junit4git/core/reports/GitTestReportStorage.java	81.25% <0%> (-2.35%)	31% <0%> (ø)
...ain/scala/org/scalatest/junit/ScalaGitRunner.scala	0% <0%> (ø)	0% <0%> (?)

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