z2-Environment

See also #2052 for the previous update.

With this ticket, we adapt Jakarta EE 8 w.r.t. the Servlet API and JTA.

This is unfortunately implied by the upgrade to Jetty 11.

Acceptance Criteria¶

• the jakarta.servlet and the jakarta.transaction namespace is adapted in
  • com.zfabrik.servletjsp
  • com.zfabrik.jta
  • All internal web apps
  • All samples