Move the /etc/os-release parser and platform detection code out of the
private _importhook module. The ipaplatform module now contains an
osinfo module that provides distribution, os, and vendor information.
See: https://www.freedesktop.org/software/systemd/man/os-release.html
See: https://pagure.io/freeipa/issue/7661
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
