Fix os_family and distribution on archlinux

Fixes #8732, ansible/ansible-modules-core#34
Variables lookup in a template should handle properly the undefined case
Merge pull request #9793 from nremond/devel

Variables lookup in a template should handle properly the undefined case
Merge pull request #9375 from mantiz/fix-osfamily-and-distribution-on-archlinux

Fix os_family and distribution on archlinux
Update the core modules to pull in some fixes
run_once tasks are skipped without checking the delegate_to host #9784