UIMA-6351: japicmp post processing script fails with Java 16 (uimaFIT)
UIMA-6351: japicmp post processing script fails with Java 16 (uimaFIT)

- Upgrade japicmp / groovy plugin/plugin dependencies for compatibility with Java 16
- Upgrade groovy-all plugin dependency for compatibility with Java 16
- Upgrade to parent POM 14 (release)

apache/uima-uimafit,apache/uima-uimafit,apache/uima-uimafit