Fix imports
Make script timeout configurable (See #12252)

Though this does not handle the fact that there
may not should be a hard-limit at all, but at
least makes the 1 hour limit configurable.
Activate property in servant definition
Correct relative v. absolute timeout

Session creations expect a relative number of milliseconds
to the start of the session itself, while the processor's
expires() method expects an absolute time (since the epoch)
Merge pull request #2821 from joshmoore/rebased/develop/12252-script-limit

12252 script limit (rebased onto develop)