Migrate all tests to JUnit5

[jra-se]

• migrate all tests to JUnit 5 API
• remove all org.junit.vintage:junit-vintage-engine dependencies as its a compatibility layer to run JUnit 4 tests in JUnit 5
• add org.junit.platform:junit-platform-launcher dependencies to all modules as recommended (or even required for newer Gradle versions)

[github-actions]

✔️ Changes pass the MontiVerse

Project	Status

details

Project	Status
montiarc	✅
umlp	✅
sd	✅
montifun	✅
fd	✅
automaton	✅
sc	✅
guidsl	✅
artifacts	✅
ocl	✅
od	✅
ucd	✅
langexperiments	✅
json	✅
xml	✅
cd2gui	✅
mlc	✅
cd4analysis	✅
monticore_basic	✅
class2mc	⏩

The MontiVerse is a collection of (internal and public) language projects.

[jra-se]

requires merge of MontiCore/cd4analysis#82 before merge

[luepges]

Gradle files look okay, the first 100 java files too :D

There appears to be 3 additional tests being skipped.
Could it be caused by the @Disabled now being in effect? (e.g. in MontiCoreToolTest.java)

project	dev	update-junit-5
build-generator	1380 tests run, 1377 passed, 3 skipped, 0 failed	1380 tests run, 1377 passed, 3 skipped, 0 failed
build-mc	6718 tests run, 6701 passed, 17 skipped, 0 failed	6716 tests run, 6696 passed, 20 skipped, 0 failed ⚠️
test-01-exp	308 tests run, 293 passed, 15 skipped, 0 failed	308 tests run, 293 passed, 15 skipped, 0 failed
test-02-exp	88 tests run, 88 passed, 0 skipped, 0 failed.	88 tests run, 88 passed, 0 skipped, 0 failed.
test-it	336 tests run, 336 passed, 0 skipped, 0 failed	336 tests run, 336 passed, 0 skipped, 0 failed
test-it-emf	No test results found!	No test results found!
test-grammar-it	15 tests run, 15 passed, 0 skipped, 0 failed.	15 tests run, 15 passed, 0 skipped, 0 failed.
test-montitrans	158 tests run, 156 passed, 2 skipped, 0 failed.	158 tests run, 156 passed, 2 skipped, 0 failed.