Merge d2bdca837b into 2c52f969e1

Sometimes it's necessary to configure SELinux before it's enabled on the
system. There's `ignore_selinux_state` which should allow it. Before
this change `seboolean` module failed on SELinux disabled system even
with `ignore_selinux_state: true` and SELinux policy installed while
`semanage boolean` worked as expected:

    $ ansible -i 192.168.121.153, -m seboolean -a "name=ssh_sysadm_login state=on ignore_selinux_state=true" all
    192.168.121.153 | FAILED! => {
        "ansible_facts": {
            "discovered_interpreter_python": "/usr/bin/python3"
        },
        "changed": false,
        "msg": "Failed to get list of boolean names"
    }

    $ ssh root@192.168.121.153 semanage boolean -l | grep ssh_sysadm_login
    ssh_sysadm_login               (off  ,  off)  Allow ssh to sysadm login

It's caused by `selinux.security_get_boolean_names()` and
`selinux.security_get_boolean_active(name)` which required SELinux
enabled system.

This change adds a fallback to semanage API which works in SELinux
disabled system when SELinux targeted policy is installed:

    ANSIBLE_LIBRARY=plugins/modules ansible -i 192.168.121.153, -m seboolean -a "name=ssh_sysadm_login state=on persistent=true ignore_selinux_state=true" all
    192.168.121.153 | CHANGED => {
        "ansible_facts": {
            "discovered_interpreter_python": "/usr/bin/python3"
        },
        "changed": true,
        "name": "ssh_sysadm_login",
        "persistent": true,
        "state": true
    }

    $ ssh root@192.168.121.153 semanage boolean -l | grep ssh_sysadm_login
    ssh_sysadm_login               (on   ,   on)  Allow ssh to sysadm login

Note that without `persistent=true` this module is effectively NO-OP now.

Signed-off-by: Petr Lautrbach <lautrbach@redhat.com>

plugins/modules/seboolean.py

@@ -73,8 +73,7 @@ except ImportError:
     HAVE_SEMANAGE = False
 
 from ansible.module_utils.basic import AnsibleModule, missing_required_lib
-from ansible.module_utils.six import binary_type
-from ansible.module_utils._text import to_bytes, to_text
+from ansible.module_utils._text import to_text
 from ansible_collections.ansible.posix.plugins.module_utils._respawn import respawn_module, HAS_RESPAWN_UTIL