test: migrate VisibilityTest to Junit 5

[MartinWitt]

#3919
The following has changed in the code:
Replaced junit 4 test annotation with junit 5 test annotation in testMethodeWithNonAccessibleTypeArgument
Replaced junit 4 test annotation with junit 5 test annotation in testVisibilityOfClassesNamedByClassesInJavaLangPackage
Replaced junit 4 test annotation with junit 5 test annotation in testFullyQualifiedNameOfTypeReferenceWithGeneric
Replaced junit 4 test annotation with junit 5 test annotation in testName
Replaced junit 4 test annotation with junit 5 test annotation in testInvocationVisibilityInFieldDeclaration
Transformed junit4 assert to junit 5 assertion in testMethodeWithNonAccessibleTypeArgument
Transformed junit4 assert to junit 5 assertion in testVisibilityOfClassesNamedByClassesInJavaLangPackage
Transformed junit4 assert to junit 5 assertion in testFullyQualifiedNameOfTypeReferenceWithGeneric
Transformed junit4 assert to junit 5 assertion in testName
Transformed junit4 assert to junit 5 assertion in testInvocationVisibilityInFieldDeclaration

[MartinWitt]

Here we had some bad assertions I would like to refactor while transforming.