Add a glob for device type configuration

Apparently these playbooks weren't being called at all, which is really concerning

playbooks/site_pre.yml

@@ -4,6 +4,9 @@
   # Preambulatory system configuration
   # It's implicit that configuration here MUST preceed site_main.yml
 - import_playbook: all.yml
+  # Device type configuration
+- import_playbook: "{{ item }}"
+  loop: "{{ lookup('fileglob' 'device_types_*.yml') }}"
   # Platform configuration
 - import_playbook: "{{ item }}"
   loop: "{{ lookup('fileglob' 'platforms_*.yml') }}"