Fix some ansible-lint complaints.

sambox.yml

@@ -1,13 +1,13 @@
 ---
 ## This playbook deploys the sambox server.  Add 'hostname=XXX' and 'domain=YYY'
 ## to the installer boot parameters to set hostname and domain.
-## 
+##
 
 
 - name: apply configuration to the sambox server
   hosts: all
   remote_user: ansible
-  become: yes
+  become: true
 
   vars:
     ## This interface provides the default route:
@@ -22,11 +22,11 @@
     ipaddr_lan_ptr: "{{ (ipaddr_lan | ipaddr('revdns')).split('.')[1:] | join('.') }}"
     ipaddr_lan_ptr_threeoct: "{{ ipaddr_lan_ptr.split('.')[0:3] | join('.') }}"
     dhcp_start: 192.168.0.50
-    dhcp_stop:  192.168.0.150
+    dhcp_stop: 192.168.0.150
     in_inventory: 192.168.0.[50:150]
 
     di_dist: "{{ ansible_distribution_release }}"
-    di_version: 10  #"{{ ansible_distribution_major_version }}"
+    di_version: 10  # "{{ ansible_distribution_major_version }}"
     di_pkg: "debian-installer-{{ di_version }}-netboot-amd64"
 
     ansible_user: ansible
@@ -40,7 +40,7 @@
         In case you would like to prepare a test user 'foo' and have
         not done so yet, provide foo's password here.  Leave empty to
         just continue
-      private: yes
+      private: true
 
 
   pre_tasks: