roles: bootstrap-os: Use 'hostname' command on Tumbleweed

openSUSE Tumbleweed is having the same problems with CoreOS when it
comes to using the hostname ansible module (#1588, #1600) so we need
to apply a similar workaround.

Co-authored-by: Markos Chandras <mchandras@suse.de>
Link: http://bugzilla.opensuse.org/show_bug.cgi?id=997614

roles/bootstrap-os/tasks/main.yml

@@ -29,18 +29,25 @@
     gather_subset: '!all'
     filter: ansible_*
 
-- name: Assign inventory name to unconfigured hostnames (non-CoreOS)
+- name: Assign inventory name to unconfigured hostnames (non-CoreOS and Tumbleweed)
   hostname:
     name: "{{inventory_hostname}}"
-  when: ansible_os_family not in ['CoreOS', 'Container Linux by CoreOS'] and override_system_hostname
+  when:
+    - override_system_hostname
+    - ansible_distribution not in ['openSUSE Tumbleweed']
+    - ansible_os_family not in ['CoreOS', 'Container Linux by CoreOS']
 
-- name: Assign inventory name to unconfigured hostnames (CoreOS only)
+- name: Assign inventory name to unconfigured hostnames (CoreOS and Tumbleweed only)
   command: "hostnamectl set-hostname  {{inventory_hostname}}"
   register: hostname_changed
-  when: ansible_hostname == 'localhost' and ansible_os_family in ['CoreOS', 'Container Linux by CoreOS'] and override_system_hostname
+  when:
+    - ansible_hostname == 'localhost'
+    - ansible_distribution in ['openSUSE Tumbleweed'] or ansible_os_family in ['CoreOS', 'Container Linux by CoreOS']
+    - override_system_hostname
 
-- name: Update hostname fact (CoreOS only)
+- name: Update hostname fact (CoreOS and Tumbleweed only)
   setup:
     gather_subset: '!all'
     filter: ansible_hostname
-  when: ansible_os_family in ['CoreOS', 'Container Linux by CoreOS'] and hostname_changed.changed
+  when:
+    - hostname_changed.changed