corrected testing environment (not true), adjusted not understood yaml...

corrected testing environment (not true), adjusted not understood yaml formatting error from hell(tm)

roles/base/tasks/apt.yml

@@ -78,7 +78,7 @@
       - restic
       - runcron
 
-- name: Install extra packages
+- name: Install extra packages
   apt:
     name: "{{ extra_packages }}"
     state: present
@@ -86,7 +86,7 @@
     extra_packages:
       - net-tools
       - vim
-  when: "testing|default(True)"
+  when: "not testing|default(True)"
 
 - name: Remove blacklisted packages
   apt: