* Move ansible.compat.tests to test/units/compat/.
* Fix unit test references to ansible.compat.tests.
* Move builtins compat to separate file.
* Fix classification of test/units/compat/ dir.
* ios_facts: Report file system space
Parse total and free space from dir output. For this, add a hash
filesystems_info containing the keys spacetotal_kb and spacefree_kb.
* ios_facts: Add unit test for file system space reporting
* ios_facts: Add integration test for file system space reporting
* Revert model and serialnum to older version
* Add stacked versions of model and serialnum as separate facts
* Add unit test to check stacked output
* Alter model regex to address #34768
