Migrate Ant core tests to JUnit 5 #903

[HeikoKlare]

Migrates the tests in org.eclipse.ant.tests.core to JUnit 5.

• Exchange JUnit 4 test annotations
• Replace JUnit 4 test suites with JUnit platform suites
• Replace JUnit 4 assertions with JUnit 5 assertions

Contributes to https://github.com/eclipse-platform/eclipse.platform/issues/903

[github-actions[bot]]

Test Results

 1 758 files  + 51   1 758 suites  +51   1h 32m 17s :stopwatch: + 4m 21s  3 980 tests ±  0   3 958 :white_check_mark: +  1   22 :zzz: ±0  0 :x:  - 1  12 537 runs  +153  12 373 :white_check_mark: +154  164 :zzz: ±0  0 :x:  - 1 

Results for commit 5d98b6e7. ± Comparison against base commit 48ab5013.

This pull request removes 93 and adds 93 tests. Note that renamed tests count towards both.

``` org.eclipse.ant.tests.core.tests.AntSecurityManagerTest ‑ test_getInCheck org.eclipse.ant.tests.core.tests.FrameworkTests ‑ testAntClasspathEntryFromUrl org.eclipse.ant.tests.core.tests.FrameworkTests ‑ testClasspathOrdering org.eclipse.ant.tests.core.tests.FrameworkTests ‑ testClasspathOrderingDeprecated org.eclipse.ant.tests.core.tests.FrameworkTests ‑ testGetTargets org.eclipse.ant.tests.core.tests.FrameworkTests ‑ testGlobalProperty org.eclipse.ant.tests.core.tests.FrameworkTests ‑ testGlobalPropertyFile org.eclipse.ant.tests.core.tests.FrameworkTests ‑ testGlobalPropertyFileWithMinusDTakingPrecedence org.eclipse.ant.tests.core.tests.FrameworkTests ‑ testIncludeAntRuntime org.eclipse.ant.tests.core.tests.FrameworkTests ‑ testNoDefaultTarget … ``` ``` AutomatedAntSuite AntSecurityManagerTest ‑ test_getInCheck AutomatedAntSuite FrameworkTests ‑ testAntClasspathEntryFromUrl AutomatedAntSuite FrameworkTests ‑ testClasspathOrdering AutomatedAntSuite FrameworkTests ‑ testClasspathOrderingDeprecated AutomatedAntSuite FrameworkTests ‑ testGetTargets AutomatedAntSuite FrameworkTests ‑ testGlobalProperty AutomatedAntSuite FrameworkTests ‑ testGlobalPropertyFile AutomatedAntSuite FrameworkTests ‑ testGlobalPropertyFileWithMinusDTakingPrecedence AutomatedAntSuite FrameworkTests ‑ testIncludeAntRuntime AutomatedAntSuite FrameworkTests ‑ testNoDefaultTarget … ```

:recycle: This comment has been updated with latest results.