'when: X' -> 'when: X | bool' for Ansibl 2.8

roles/1-prep/tasks/main.yml

@@ -9,7 +9,7 @@
       - uuid-runtime
       - sudo
     state: present
-  when: is_debuntu
+  when: is_debuntu | bool
 
 - name: Does /etc/iiab/uuid file exist?
   stat:
@@ -77,7 +77,7 @@
 - name: OPENVPN
   include_role:
     name: openvpn
-  when: openvpn_install
+  when: openvpn_install | bool
   tags: openvpn
 
 # for rpi, without rtc, we need time as soon as possible
@@ -106,7 +106,7 @@
     name: apparmor
     enabled: False
     state: stopped
-  when: is_ubuntu
+  when: is_ubuntu | bool
   ignore_errors: true
 
 - name: Disable SELinux on next boot (OS's other than debuntu)

roles/1-prep/tasks/raspberry_pi.yml

@@ -37,14 +37,14 @@
     path: /etc/dphys-swapfile
     regexp: "^CONF_SWAPSIZE"
     line: CONF_SWAPSIZE=500
-  when: is_debuntu
+  when: is_debuntu | bool
 
 - name: Restart swap service "dphys-swapfile" (debuntu)
   #command: /etc/init.d/dphys-swapfile restart
   service:    # A rare/legacy service that is NOT systemd
     name: dphys-swapfile
     state: restarted
-  when: is_debuntu
+  when: is_debuntu | bool
 
 - name: Install RPi rootfs resizing (iiab-rpi-max-rootfs.sh) and its systemd service (iiab-rpi-root-resize.service), from templates
   template: