IPA_RULES_COMMON: Introduce ipa_common_get_hostgroupname()
By moving the get_ipa_hostgroupname() method from ipa_hbac_hosts.[ch] to
ipa_rules_common.[ch] it can be used by both HBAC and, in the future,
for new backend modules.
The method got renamed to ipa_common_get_hostgroupname() and some coding
style changes have been made in order to match with what SSSD follows.
Related:
https://pagure.io/SSSD/sssd/issue/2995
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Pavel Březina <pbrezina@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>