Fortios file only mode + integration tests (#23275)

* WIP file_mode

* WIP

* Add file_mode + integration tests

* fix pep8

* Update doc fragments
Create mutualy_exclusive param
Fix yamllint problem in tests

* Add aliases file + main playbook for fortios

* Install pyfg before running tests

* Install pyfg before running tests in role

* Remove pre_task as it's done in roles

* Force pyFG minimal version for python3

* role_path not role_dir :(

* Change requirements

* Specify Error type when error on import

* Bug in pygf library with python 2.5 (PR is waiting https://github.com/spotify/pyfg/pull/19)

* Bad requirement format

* still bad format -_-'

* remove test/integration/fortios.py (auto generated by tests)
missing new lines at end of file

* pyFG is now fixed in 0.50

test/integration/targets/fortios_ipv4_policy/aliases

@@ -0,0 +1 @@
+posix/ci/group1

test/integration/targets/fortios_ipv4_policy/files/requirements.txt

@@ -0,0 +1 @@
+pyfg>=0.50

test/integration/targets/fortios_ipv4_policy/tasks/main.yml

@@ -0,0 +1,7 @@
+---
+- name: install required libraries
+  pip:
+    requirements: "{{ role_path }}/files/requirements.txt"
+
+- { include: test_indempotency.yml }
+- { include: test_params.yml }

test/integration/targets/fortios_ipv4_policy/tasks/test_indempotency.yml

@@ -0,0 +1,68 @@
+---
+ - name: Add policy
+   fortios_ipv4_policy:
+     file_mode: true
+     config_file: "{{role_path}}/files/default_config.conf"
+     id: 42
+     src_addr: all
+     dst_addr: all
+     policy_action: accept
+     service: ALL
+     state: present
+   register: add_policy
+
+ - name: Assert
+   assert:
+     that:
+      - "add_policy.changed == true"
+
+ - name: Add existing policy 
+   fortios_ipv4_policy:
+     file_mode: true
+     config_file: "{{role_path}}/files/default_config.conf"
+     id: 42
+     src_addr: all
+     dst_addr: all
+     policy_action: accept
+     service: ALL
+     state: present
+   register: add_policy
+
+ - name: Assert
+   assert:
+     that:
+      - "add_policy.changed == false"
+
+ - name: Delete existing policy
+   fortios_ipv4_policy:
+     file_mode: true
+     config_file: "{{role_path}}/files/default_config.conf"
+     id: 42
+     src_addr: all
+     dst_addr: all
+     policy_action: accept
+     service: ALL
+     state: absent
+   register: del_policy
+
+ - name: Assert
+   assert:
+     that:
+      - "del_policy.changed == true"
+
+ - name: Delete not-existing policy
+   fortios_ipv4_policy:
+     file_mode: true
+     config_file: "{{role_path}}/files/default_config.conf"
+     id: 42
+     src_addr: all
+     dst_addr: all
+     policy_action: accept
+     service: ALL
+     state: absent
+   register: del_policy
+
+ - name: Assert
+   assert:
+     that:
+      - "del_policy.changed == false"

test/integration/targets/fortios_ipv4_policy/tasks/test_params.yml

@@ -0,0 +1,74 @@
+---
+ - name: Forget id
+   fortios_ipv4_policy:
+     file_mode: true
+     config_file: "{{role_path}}/files/default_config.conf"
+     # id: 42
+     src_addr: all
+     dst_addr: all
+     policy_action: accept
+     service: ALL
+     state: present
+   register: forget_id
+   ignore_errors: True
+
+ - name: Forget src_addr
+   fortios_ipv4_policy:
+     file_mode: true
+     config_file: "{{role_path}}/files/default_config.conf"
+     id: 42
+     # src_addr: all
+     dst_addr: all
+     policy_action: accept
+     service: ALL
+     state: present
+   register: forget_src_addr
+   ignore_errors: True
+
+ - name: Forget dst_addr
+   fortios_ipv4_policy:
+     file_mode: true
+     config_file: "{{role_path}}/files/default_config.conf"
+     id: 42
+     src_addr: all
+     # dst_addr: all
+     policy_action: accept
+     service: ALL
+     state: present
+   register: forget_dst_addr
+   ignore_errors: True
+
+ - name: Forget policy_action
+   fortios_ipv4_policy:
+     file_mode: true
+     config_file: "{{role_path}}/files/default_config.conf"
+     id: 42
+     src_addr: all
+     dst_addr: all
+     # policy_action: accept
+     service: ALL
+     state: present
+   register: forget_policy_action
+   ignore_errors: True
+
+ - name: Forget service
+   fortios_ipv4_policy:
+     file_mode: true
+     config_file: "{{role_path}}/files/default_config.conf"
+     id: 42
+     src_addr: all
+     dst_addr: all
+     policy_action: accept
+     # service: ALL
+     state: present
+   register: forget_service
+   ignore_errors: True
+
+ - name: Verify that all previous test have failed
+   assert:
+     that:
+      - "forget_id.failed == True"
+      - "forget_src_addr.failed == True"
+      - "forget_dst_addr.failed == True"
+      - "forget_policy_action.failed == True"
+      - "forget_service.failed == True"