Explode test cases

Take care to have as little asserts as possible within test cases
Merge branch 'master' into refactor-test-suite

* master:
  [Fix #263] Filter for real nodes when parsing cppcheck XML
Improve naming of documentation tests
Merge PHP test resources
Add test for phpmd rulesets
Merge Javascript test resources
Merge branch 'refactor-test-suite'

* refactor-test-suite:
  Merge Javascript test resources
  Add test for phpmd rulesets
  Merge PHP test resources
  Improve naming of documentation tests
  Explode test cases