Update to JUnit5

[MartinWahnschaffe]

Problem Description

JUnit5 is out since 2017 and brings the following benefits:

• we get more granularity, and can import only what's necessary
• JUnit 5 allows multiple runners to work simultaneously
• JUnit5 allows Java8+ language features like lambda functions, making tests more powerful and easier to maintain.
• new features for describing, organizing, and executing tests. For instance, tests get better display names and can be organized hierarchically (e.g. https://medium.com/@boonkeat/android-unit-testing-with-junit5-d1b8f9c620b6)
• Allows combination of multiple extensions

Furthermore JUnit5 gives us more freedom of choice and comfort related to replacing our CDI unit testing framework.
See #10074 (comment)

Proposed Change

Update to JUnit5. This means replacing imports and few clean ups.
The whole process should be done in one step.
Check whether Android app should be updated as-well or separately. -> Separately

Acceptance Criteria

Implementation Details

• org.unit.Test -> org.junit.jupiter.api.Test
• org.junit.Assert.* -> org.junit.jupiter.api.Assertions.*
• org.junit.Assert.assertThat -> org.hamcrest.MatcherAssert.assertThat
• Before -> BeforeEach
• BeforeClass -> BeforeAll
• After -> AfterEach
• ArchUnitRunner no longer needed
• Test(expected=Exception) -> assertThrows
• Some assertions currently have string message first -> is last param instead now
• Use latest WireMock version for Junit5
• CaseFacadeEjbTest: Extract wire mock related tests
• TestContainers Junit5 extension + workaround: GenericContainer run from Jupiter tests shouldn't require JUnit 4.x library on runtime classpath testcontainers/testcontainers-java#970 (comment)
• Move tests for external surveillance functionality from CaseServiceTest and EventServiceTest into ExternalSurveillanceToolGatewayFacadeEjbTest
• Remove sharing logic from testArchive... test in CaseFacadeEjbTest and EventFacadeEjbTest

Additional Information

[StefanKock]

While working on #10801 I noticed that StartupShutdownServiceTest has a compile error in my Eclipse because testcontainers still relies on JUnit 4: The type org.junit.runner.Description cannot be resolved. It is indirectly referenced from required .class files

I tried @SuppressWarnings("all") but that did not help. On Jenkins the test testHistoryTablesMatch runs successfully (33s).