Factor frr role from debian, ceph and proxmox

Consolidate base system and networking setup into debian role and BGP
configuration into frr role. Add facts role to collect data from NetBox
once to avoid many slow lookups. Also many other tweaks and cleanups.

roles/proxmox/tasks/user.yml

@@ -1,17 +1,19 @@
 # synchronize user and group data from LDAP when sync-ldap context key is set to a realm
-- block:
+- name: Set up LDAP user synchronization
+  when: '"sync-ldap" in hostvars[inventory_hostname]'
+  block:
     - name: Install LDAP sync script
       template:
         dest: /usr/local/bin/sync-ldap.py
         src: sync-ldap.py.j2
         mode: 0700
-      when: primary == inventory_hostname
+      when: is_primary
 
     - name: Remove LDAP sync script
       file:
         path: /usr/local/bin/sync-ldap.py
         state: absent
-      when: primary != inventory_hostname
+      when: not is_primary
 
     - name: Configure cronjob
       cron:
@@ -21,5 +23,4 @@
         cron_file: sync-ldap
         hour: "2"
         minute: "51"
-        state: '{{ "present" if inventory_hostname == primary else "absent" }}'
-  when: '"sync-ldap" in hostvars[inventory_hostname]'
+        state: '{{ "present" if is_primary else "absent" }}'