Since 2.0 made all includes dynamic, it is now possible to create and
include a file in the course of executing a playbook. However, with the
introduction of implicit static includes this can cause problems if an
include is thought to be static but does not yet exist. For now, we're
handling missing implicit static includes as a potential dynamic include
but also adding a deprecation message to show includes like this will
need to be marked as `static: no` in the future.
Fixes#15342
* Can be configured in the ansible.cfg for tasks/handlers individually
* If an included filename contains no vars or loops, it will be expanded
in-place as if it were marked as static
* Speed up serialization of hostvars by simply using the internal
dictionary used for cached lookups
* Use blocking gets/puts on queues instead of spin locking
* Merge sequential implicitly created blocks
James Cammarata
Martin Matuska
Matt Martz
Brian Coca
Marius Gedminas