ospack-minimal: Make the Canterbury appfw conditional on ivitools

Introduce the `ivitools` variable as used by the target recipe to
control the inclusion of the Canterbury/Ribchester app framework.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

apertis-ospack-minimal.yaml

@@ -4,6 +4,7 @@
 {{- $suite := or .suite "v2019dev0" -}}
 {{- $timestamp := or .timestamp "" -}}
 {{- $ospack := or .ospack (printf "ospack_%s-%s-%s" $suite $architecture $type) -}}
+{{- $ivitools := or .ivitools "enabled" -}}
 {{- $lxc := or .lxc "enabled" -}}
 
 architecture: {{ $architecture }}
@@ -62,12 +63,14 @@ actions:
       - apparmor
       - chaiwala-apparmor-profiles
 
+  {{ if eq $ivitools "enabled" }}
   - action: apt
     description: "Application framework packages"
     packages:
       - canterbury-core
       - newport
       - ribchester-core
+  {{ end }}
 
   - action: apt
     description: "Test environment packages"