New Permission management module

There is a new permission management module placed in the plugins folder:

    plugins/modules/ipapermission.py

The permission module allows to ensure presence of absence of permissions
and manage permission members.

Here is the documentation for the module:

    README-permission.md

New example plabooks have been added:

    playbooks/permission/permission-absent.yml
    playbooks/permission/permission-allow-read-employeenum.yml
    playbooks/permission/permission-member-absent.yml
    playbooks/permission/permission-member-present.yml
    playbooks/permission/permission-present.yml
    playbooks/permission/permission-renamed.yml

New tests for the module:

    tests/permission/test_permission.yml

playbooks/permission/permission-member-absent.yml

@@ -0,0 +1,12 @@
+---
+- name: Permission absent example
+  hosts: ipaserver
+  become: true
+
+  tasks:
+  - name: Ensure privilege User Administrators privilege is absent on Permission TestPerm1
+    ipapermission:
+      name: TestPerm1
+      privilege: "User Administrators"
+      action: member
+      state: absent