parallelize tests

Author: LarsEckart

src/test/resources/junit-platform.properties

@@ -1,2 +1,7 @@
 #junit.jupiter.testmethod.order.default=lars.SlowTestLastMethodOrder
 junit.jupiter.testclass.order.default=lars.SlowTestLastClassOrder
+
+junit.jupiter.execution.parallel.enabled = true
+junit.jupiter.execution.parallel.mode.default = same_thread
+junit.jupiter.execution.parallel.mode.classes.default = same_thread
+