Fix on debian openstack images (#55)

* on openstack Debian images, the kernel is different, so we need to install different kernel headers, too

* fix syntax error in conditional fact

* remove debug message

Co-authored-by: Peter Pallinger <pallinger@sztaki.hu>

tasks/setup-debian-vanilla.yml

@@ -18,10 +18,13 @@
   register: dpkg_arch
   changed_when: False
 
+- set_fact:
+    kernel_header_version: "{{ ('-cloud-' in ansible_kernel) | ternary(ansible_kernel,dpkg_arch.stdout) }}"
+
 - name: (Debian) Install kernel headers to compile Wireguard with DKMS
   apt:
     name:
-      - "linux-headers-{{ dpkg_arch.stdout }}"
+      - "linux-headers-{{ kernel_header_version }}"
     state: present
 
 - name: (Debian) Install wireguard packages