When configuring a "Pooled TCP port", the pool assignment is not unique when the build is performed concurrently (see "Execute concurrent builds if necessary").

Never had an issue before and problem seems to be introduced after we updated to Jenkins 2.0.

Easy repro:

• create new job with "Pooled TCP port" and "Execute concurrent builds if necessary" options
• execute build multiple times
• see console output: same port is assigned multiple times