* add initial openapi config and java generated files
* add java implementation for adding generator version
* regenerate sample client files
* remove tabs
* only show generated version if build info exists
* set build info for batch generation
* update generator doc for new global flag
* use existing property for generator version
* update templates to include generator version
* update templates for better generator version syntax
* revert undesired changes
* regenerate samples for openapi client
* update templates to correct formatting/newlines
* correct description text and add to usage doc
* add generator cli option for all codegen types
* use more concise version info; update existing codegens to support new prop
* correct wrong prop reference
* add initial test coverage for new prop
* update last (scala) templates with new prop
* update samples after upstream merge
* use consistent version output
* use better sample project id/name
* revert using option for generator version in templates
* updating test to use the Java RESTEasy echo api client (#17367)
* regenerated samples
* set source and target to 1.8 to fix workflow failure, adapted parser
