Fix some ansible-lint complaints.

roles/netboot-installer/tasks/main.yml

@@ -2,6 +2,7 @@
   file:
     path: "{{ tftp_root }}/d-i/{{ di_dist }}"
     state: directory
+    mode: 0755
 
 - name: install di-netboot-assistant and installer package
   apt:
@@ -16,11 +17,12 @@
   copy:
     src: /usr/share/doc/di-netboot-assistant/examples/preseed.cfg
     dest: "{{ tftp_root }}/d-i/{{ di_dist }}"
-    force: no
-    remote_src: yes
+    mode: 0644
+    force: false
+    remote_src: true
 
 - name: make the hostname resolvable from the LAN
   replace:
     path: /etc/hosts
     regexp: '^(127\.0\.1\.1.*)$'
-    replace: '#\1\n{{ ipaddr_lan | ipaddr("address") }}	{{ ansible_hostname }}.{{ ansible_domain }}	{{ ansible_hostname }}'
+    replace: '#\1\n{{ ipaddr_lan | ipaddr("address") }} {{ ansible_hostname }}.{{ ansible_domain }} {{ ansible_hostname }}'