SLING-13088: [Sling Models] Migrate ModelAdapterFactory, Ordering & OSGi tests to JUnit 5

[bkkothari2255]

Issue: SLING-13088

• Migrated 8 test classes:

1. ModelAdapterFactoryTest
2. ModelAdapterFactory_ImplementationPickerOrderTest
3. ModelAdapterFactory_InjectorOrderTest
4. ModelPackageBundleListenerTest
5. MultipleInjectorTest
6. OSGiInjectionTest
7. OptionalObjectsTest
8. OptionalPrimitivesTest

• Changes
  • Replaced MockitoJUnitRunner with @ExtendWith(MockitoExtension.class)
  • Converted @Test(expected) to assertThrows()
  • Switched to doReturn().when() to resolve generic type inference issues
  • Corrected assertion argument order (expected vs. actual)
  • Added <?> wildcards to raw Type variables to fix compiler warnings
  • Renamed shadowed local log variables to logger to avoid conflicts
  • Removed unnecessary eq() matchers and redundant throws declarations
  • Cleaned up @SuppressWarnings and resolved related Sonar issues
  • Applied lenient() strictness to preserve legacy behavior
  • Added JUnit 5 OSGi dependency for implementation picker & Injector order test

[stefanseifert]

great - thanks again for this PR for the migration.

please see my note regarding the IT fix, it should not be part of this PR, and is likely not fixing the root cause for the flakyness we have from time to time.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[stefanseifert]

thanks!