Intercept extensions of BlockJUnit4ClassRunner, fix context issue

• Intercept extensions of BlockJUnit4ClassRunner, not just the class itself.
• Switch context from TestClass (which gets re-used in parallel execution) to runner (which is unique)

Parameterized artifact capture and more

• Factor AtomIdentity test rule out of ArtifactCollector for non-capturing applications.
• Switch logger in AtomIdentity to Optional
• Back-port the DisplayName annotation from JUnit 5
• Upgrade to the latest Java Utils release (1.7.3)
• Add parameterized artifact capture unit test
• Update README

Fixes for ServiceLoader thread safety issues

• Add synchronization to access of ServiceLoader objects.
• Switch NOTIFIERS set to thread-safe CopyOnWriteArraySet.

junit-foundation-6.3.0

• Add TestClassWatcher2 interface that provides JUnit runner for context with start/finish notifications.
• Deprecate corresponding notifications in TestClassWatcher interface.
• Add implementation to fire TestClassWatcher2 notifications.
• README: Update documentation to replace TestClassWatcher references with TestClassWatcher2.

junit-foundation-6.2.0

• POM: Upgrade to Byte Buddy 1.9.3 to provide Java 11 compatibility
• README: Document static context mapping methods

junit-foundation-6.1.4

• Add 'public' access specified to RunReflectiveCall.getTargetFor(FrameworkMethod)
• README:
  • Upgrade JUnit Foundation version references
  • Switch from maven-compiler-plugin to source/target properties for Java version specification

junit-foundation-6.1.3

• Upgrade to Settings API 2.2.2

junit-foundation-6.1.2

• Upgrade to Java Utils 1.7.2

junit-foundation-6.1.1

• Add common handling for propagation of proxy exceptions
• README: Add documentation for runner watcher feature

junit-foundation-6.1.0

• Add tracking of associations between methods and the TestClass objects that own them
• Implement runner watcher feature