Move extra_pkgs*-handling to the up2date-debian role.

roles/up2date-debian/tasks/main.yml

@@ -15,3 +15,23 @@
   apt:
     name: etckeeper
     state: latest
+
+- name: install extra packages from stable
+  apt:
+    name: "{{ extra_pkgs }}"
+    state: latest
+  when: extra_pkgs|length
+
+- name: add {{ ansible_distribution_release }}-backports
+  apt_repository:
+    repo: deb http://deb.debian.org/debian/ {{ ansible_distribution_release }}-backports main
+    state: present
+    update_cache: yes
+  when: extra_pkgs_bpo|length
+
+- name: install extra packages from backports
+  apt:
+    name: "{{ extra_pkgs_bpo }}"
+    state: latest
+    default_release: "{{ ansible_distribution_release }}-backports"
+  when: extra_pkgs_bpo|length