* Use locking for concurrent file access
This implements locking to be used for modules that are used for
concurrent file access, like lineinfile or known_hosts.
* Reinstate lock_timeout
This commit includes:
- New file locking infrastructure for modules
- Enable timeout tests
- Madifications to support concurrency with lineinfile
* Rebase, update changelog and tests
We need to specify ansible_python_interpreter to avoid running interpreter discovery and selecting the incorrect interpreter.
Remove the import of lock in known_hosts since it is not used.
