MAINT: update JUnit4 to JUnit5

pom.xml

...rg/caosdb/server/scripting/ServerSideScriptingCaller.java

src/test/java/org/caosdb/CaosDBTestClass.java

src/test/java/org/caosdb/datetime/DateTimeTest.java

src/test/java/org/caosdb/server/Misc.java

...osdb/server/accessControl/TestDefaultPamScriptCaller.java

.../java/org/caosdb/server/authentication/AuthTokenTest.java

src/test/java/org/caosdb/server/caching/TestCaching.java

src/test/java/org/caosdb/server/caching/TestNoCaching.java

...org/caosdb/server/database/DatabaseAccessManagerTest.java

src/test/java/org/caosdb/server/database/InsertTest.java

.../database/backend/transaction/RetrieveFullEntityTest.java

...server/database/backend/transactions/TestGetAllNames.java

src/test/java/org/caosdb/server/datatype/testBoolean.java

src/test/java/org/caosdb/server/entity/EntityTest.java

src/test/java/org/caosdb/server/entity/SelectionTest.java

...caosdb/server/entity/container/PropertyContainerTest.java

...osdb/server/entity/xml/PropertyToElementStrategyTest.java

...va/org/caosdb/server/grpc/CaosDBToGrpcConvertersTest.java

src/test/java/org/caosdb/server/jobs/JobConfigTest.java