With JUnit Jupiter it is still not possible to set the ClassLoader for loading the test class.
Therefore, use the ModifiedClassLoaderExtension (heavily inspired by the Spring Boot bde7bd0a1a/spring-boot-project/spring-boot-tools/spring-boot-test-support/src/main/java/org/springframework/boot/testsupport/classpath/ModifiedClassPathExtension.java).
Once JUnit Jupiter 201 is resolved we can simplify this.
With this extension we can catch all the tests in a class and then run them once the Class Extension Store gets closed with a modified ClassLoader.
The CompilationCache is stored in the GlobalCache with the CompilationRequest as key.
This means that even when methods are not executed in some particular order if they have same WithClasses
then they would reuse the cache.
Adapt checkstyle configuration with new changes:
* Move cacheFile to Checker module
* Move LineLength to Checker module
* Use SuppressWithPlainTextCommentFilter
* Do not use maven-processor-plugin and use the maven-compiler-plugin annotationProcessors instead
* Update NoPackageCyclesRule and exclude tests
* Update checkstyle to 8.14 and remove FIleContentsHolder module and move SuppressionCommentFilter to the TreeWalker
* Update assertj to 3.11.1 and replace usage of RuntimeIOException (from AssertJ) with UncheckedIOException (from java 8)
* Add how to import MapStruct into IntelliJ and Eclipse into the readme
* Move classes from mapstruct-common into mapstruct
* Use Java 8 @Repeatable for @Mappings and @ValueMappings in the mapstruct module
* Add relocation for mapstruct-jdk8 to mapstruct
* Use of 1.8 source and target versions from parent POM
* Update documentation to match
* Update versions of some maven plugin crashing build on Java 8
* Drop JDK 6 & 7 support in integration tests
* Remove mapstruct-common module (it was never deployed to Central)
* Don't run the ProtobufBuilderTest with the processor_plugin_java8 and eclipse_jdt_java_8 (processor plugin runs before the proto java classes are created and the eclipse plugin has some bug)
* Include *.proto for license checks
* #122 Use util methods when possible
* Fix some warnings in Javadoc generation
* Don't use raw classes when not needed
* Add .yml, binding.xjb and .asciidoc files to license check exclusion
