#121 #130 #123 #46 #100 #130 Upgrade to Eclipse 2021-06 + dependency licenses + Maven 3.8.1 + fix runtime JDT compilation + no more limit-modules

#121 (closed) Upgrade to Eclipse 2021-06 and associated dependencies.

#121 (closed) No more version range for Batik. Now just like other dependencies.

#121 (closed) No GUI mode for ReportExceptionTest.

• Setting option values before option parsing has no effect.
• Provide as command line argument instead.

#121 (closed) Improved upgrade and build instructions.

#121 (closed) #130 (closed) Updated DEPENDENCIES.txt.

• For org.tukaani.xz change (#130 (closed)).
• For Eclipse 2021-06 (#121 (closed)).
• We seem to have a false negative for the license check.
  • Concerns org.apache.batik.dom.svg 1.14 from Orbit.
  • See https://github.com/eclipse/dash-licenses/issues/76.

#123 (closed) Upgrade Maven 3.6.3 to 3.8.1.

#46 (closed) Fixed runtime Java compilation using JDT compiler.

#46 (closed) Re-enabled runtime Java compiler tests for JDT compiler.

• Fix runtime Java compiler tests for Maven build.
  • Disabled annotation processing for runtime Java compiler tests.

#46 (closed) Runtime Java compiler improvements/fixes.

• Extra debug output for runtime Java compiler.
• Automatically determine Java version for RuntimeJavaCompiler.

#100 (closed) Removed limit-modules configuration for app framework.

• No longer needed for Eclipse 2021-06.

Closes #46 (closed) Closes #100 (closed) Addresses #121 (closed) Closes #123 (closed) Closes #130 (closed)