Some attributes are not present in all supported versions of FreeIPA,
and this might cause tests to fail due to unsupported versions.
This patch add the means to test if a test can be executed based on
the target host FreeIPA version.
FreeIPA 4.8.7 introduced an option to rename an existing hostgroup.
This patch adds support for renaming hostgroups if the option is
available on installed IPA version.
A new state `renamed` and a new option `rename` (alias: `new_name`)
was added to module `ipahostgroup` to allow renaming of host groups.
The implemented behavior is:
* Rename if `name` exists and `rename` doesn't.
* Do nothing if `name` does not exist and `rename` does, or if
`name` equals to `rename`. (result.changed is False)
* Fail if neither or both `name` and `rename` exist.
