Merge pull request #1001 from dkarpele/dkarpele-879

README-group.md

playbooks/group/add-group.yml

playbooks/group/add-groups-to-group.yml

playbooks/group/add-groups.yml

playbooks/group/add-user-to-group.yml

playbooks/group/delete-group.yml

plugins/modules/ipagroup.py

tests/group/create_groups_json.yml

tests/group/groups.sh

tests/group/test_group_client_context.yml

tests/group/test_groups.yml

tests/group/test_groups_absent.yml

tests/group/test_groups_external_nonposix.yml

tests/group/test_groups_present.yml

tests/group/test_groups_present_slice.yml

tests/sanity/ignore-2.12.txt

tests/sanity/ignore-2.13.txt

tests/sanity/ignore-2.14.txt