New idoverrideuser management module.

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

    plugins/modules/ipaidoverrideuser.py

The idoverrideuser module allows to ensure presence and absence of
idoverrides for users and certificate members.

Here is the documentation for the module:

    README-idoverrideuser.md

New example playbooks have been added:

    playbooks/idoverrideuser/idoverrideuser-absent.yml
    playbooks/idoverrideuser/idoverrideuser-certificate-absent.yml
    playbooks/idoverrideuser/idoverrideuser-certificate-present.yml
    playbooks/idoverrideuser/idoverrideuser-present.yml

New tests for the module can be found at:

    tests/idoverrideuser/test_idoverrideuser.yml
    tests/idoverrideuser/test_idoverrideuser_client_context.yml

playbooks/idoverrideuser/idoverrideuser-absent.yml

@@ -0,0 +1,13 @@
+---
+- name: Playbook to manage idoverrideuser
+  hosts: ipaserver
+  become: false
+
+  tasks:
+  - name: Ensure test user test_user is absent in idview test_idview
+    ipaidoverrideuser:
+      ipaadmin_password: SomeADMINpassword
+      idview: test_idview
+      anchor: test_user
+      continue: true
+      state: absent

playbooks/idoverrideuser/idoverrideuser-certificate-absent.yml

@@ -0,0 +1,15 @@
+---
+- name: Playbook to manage idoverrideuser
+  hosts: ipaserver
+  become: false
+
+  tasks:
+  - name: Ensure test user test_user certificate member is absent in idview test_idview
+    ipaidoverrideuser:
+      ipaadmin_password: SomeADMINpassword
+      idview: test_idview
+      anchor: test_user
+      certificate:
+      - "{{ lookup('file', 'cert1.b64', rstrip=False) }}"
+      action: member
+      state: absent

playbooks/idoverrideuser/idoverrideuser-certificate-present.yml

@@ -0,0 +1,14 @@
+---
+- name: Playbook to manage idoverrideuser
+  hosts: ipaserver
+  become: false
+
+  tasks:
+  - name: Ensure test user test_user certificate member is present in idview test_idview
+    ipaidoverrideuser:
+      ipaadmin_password: SomeADMINpassword
+      idview: test_idview
+      anchor: test_user
+      certificate:
+      - "{{ lookup('file', 'cert1.b64', rstrip=False) }}"
+      action: member

playbooks/idoverrideuser/idoverrideuser-present.yml

@@ -0,0 +1,11 @@
+---
+- name: Playbook to manage idoverrideuser
+  hosts: ipaserver
+  become: false
+
+  tasks:
+  - name: Ensure test user test_user is present in idview test_idview.
+    ipaidoverrideuser:
+      ipaadmin_password: SomeADMINpassword
+      idview: test_idview
+      anchor: test_user