Related to ISSUE-48360: Remove friendlyWarnings from build-system

That is a unused build parameter which was only set from the MMC GUI Rebuild system (removed in 21Q1). Remove it from:

• some javac compile tasks passing it as nowarn option
• wad validation code (where it was hiding the concrete problems)
• Passing it around during ant apply.module

2nd commit changes behavior:

• Instead of hiding warning (if any) in apply.module with argument 'already shown in generate.entities'
• Just remove that extra logic
  • Will show them twice in build
  • But were also sown on every tomcat startup, export.db any other dal usages
  • Developers should just fix up the cause instead

try-run: https://builds.openbravo.com/view/try/job/try-init/1173/