=pro #3558 Add validate-pull-request task
=tes #3563: Mark internal Testkit messages as NoSerializationVerificationNeeded
Merge pull request #1693 from drewhk/wip-3563-testkit-internal-msg-serialization-drewhk

=tst #3563: Mark internal Testkit messages as NoSerializationVerificatio...
Merge pull request #1692 from akka/wip-3558-validate-pr-task-patriknw

=pro #3558 Add validate-pull-request task (forward port)
=act #3565 Add ClassTag in Props.apply(creator)

* Remove deprecated apply without ClassTag
Merge pull request #1697 from akka/wip-3565-props-apply-master-patriknw

=act #3565 Add ClassTag in Props.apply(creator) (forward port)
fix scripts/authors.pl

- used to omit commits which touched only one file
- used to omit commits which only inserted or deleted lines
Merge remote-tracking branch: upstream/master