Fix FR-44064: Unsupport Java 8 and raise minimum supported version to Java 11

This MR is meant to unsupport Java 8 for Openbravo compilation and raise the minimum version supported to Java 11.

Blocking MRs (Merge before this)

• https://gitlab.com/openbravo/product/pmods/org.openbravo.client.analytics/-/merge_requests/3

Tasks

• Update build.xml
  • Update JavaDoc -html5 tag, remove the condition for jdk8
  • Update source to use Java8, found at least one usage in JavaDoc task
• Update Eclipse's preferences
• Update Jasper Reports ecj compiler (Library update)
  • Update jdt-compiler to latest ecj version
  • Test Java 11 functionality in JasperReport (JasperReportsCompilation test)
  • Test that all jrxml compile correctly (AllJrxmlCompilation test)
• Await for RM to implement required CI changes

Affected libraries

Library	Version	Status	Comment
jdt-compiler	4.4.2	Removed	This is a renamed ecj, it is removed and substituted with the next library
ecj	4.17	Added	This is the Eclipse's compiler for Java library

jdt-compiler -> ecj

• JDK Version Compatibility: 52 (JDK 8)
• License: Eclipse's Public License 2.0
• New size: 3.0 MB (~0.7 MB more than the previous jdt-compiler (2.3 MB))
• Update wiki page
• Update dependencies repository

Related MRs

• dbsm!16 (merged)
• https://gitlab.com/openbravo/product/pmods/org.openbravo.retail.poshwmanager.sources/-/merge_requests/13

Links

• Project page