playbook: Propagate and set on crontab the upgrade_kernel

  The user can decide set upgrade kernel as True, by doing so, the computer will start
  to automatically upgrade kernel on the next upgrades.

playbook/roles/upgrader/tasks/main.yml

@@ -66,12 +66,10 @@
       chdir: /opt/upgrader/playbook-tmp/
 
   - name: Set Cron
-    cron: name="Launch Upgrader with ansible" minute="0" hour="*/3" job='rm -rf /opt/upgrader/playbook && cp -R /opt/upgrader/playbook-tmp /opt/upgrader/playbook && cd /opt/upgrader/playbook && PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin ansible-playbook upgrader-run.yml --extra-vars "upgrader_playbook={{ upgrader_playbook }}" -i hosts 2>>/opt/upgrader/latest_upgrade.log >> /opt/upgrader/latest_upgrade.log'
+    cron: name="Launch Upgrader with ansible" minute="0" hour="*/3" job='rm -rf /opt/upgrader/playbook && cp -R /opt/upgrader/playbook-tmp /opt/upgrader/playbook && cd /opt/upgrader/playbook && PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin ansible-playbook upgrader-run.yml --extra-vars "upgrader_playbook={{ upgrader_playbook }} upgrade_kernel={{ upgrade_kernel | default(False) == True }}" -i hosts 2>>/opt/upgrader/latest_upgrade.log >> /opt/upgrader/latest_upgrade.log'
 
   - cron: name="Launch Upgrader" state=absent
 
-
-
   - name: Upgrade Current Upgrade Signature
     shell: cat /opt/upgrader/next-upgrade-signature > /opt/upgrader/current-upgrade-signature
     when: (upgrade_after > lookup('file', '/opt/upgrader/last-upgrade')|int ) and (lookup('file', '/opt/upgrader/next-upgrade-signature') != lookup('file', '/opt/upgrader/current-upgrade-signature'))