Reboot - add parameter for paths to search for shutdown command (#51194)

* Look in /lib/molly-guard for shutdown command

Signed-off-by: Sam Doran <sdoran@redhat.com>

* Add parameter for extra_search_paths

Signed-off-by: Sam Doran <sdoran@redhat.com>

* Change option to search_paths

- Update docs
- Make the parameter replace the default values
- Add some sanity checking on the data type

Signed-off-by: Sam Doran <sdoran@redhat.com>

* Correct parameter in tests, change conditional for molly-guard tasks

Signed-off-by: Sam Doran <sdoran@redhat.com>

* Address feedback

* Simplify field validation

Needed the try except in case a non-iterable type is put in the search_paths field

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

@@ -37,11 +37,13 @@
     - name: Reboot with all options
       reboot:
         connect_timeout: 30
+        search_paths: /usr/local/bin
         msg: Rebooting
         post_reboot_delay: 1
         pre_reboot_delay: 61
         test_command: uptime
         reboot_timeout: 500
+      register: reboot_result
 
     - import_tasks: check_reboot.yml
 
@@ -51,6 +53,7 @@
       reboot:
         post_reboot_delay: -0.5
         pre_reboot_delay: -61
+      register: reboot_result
 
     - import_tasks: check_reboot.yml
 
@@ -75,6 +78,27 @@
       vars:
         timeout: "{{ timeout_value[ansible_facts['distribution'] | lower] | default(60) }}"
 
+    - name: Test molly-guard
+      block:
+        - import_tasks: get_boot_time.yml
+
+        - name: Install molly-guard
+          apt:
+            update_cache: yes
+            name: molly-guard
+            state: present
+
+        - name: Reboot when molly-guard is installed
+          reboot:
+            search_paths: /lib/molly-guard
+          register: reboot_result
+
+        - import_tasks: check_reboot.yml
+
+      when: ansible_facts.distribution in ['Debian', 'Ubuntu']
+      tags:
+        - molly-guard
+
   always:
     - name: Cleanup temp file
       file: