Disable retry files by default

Disable retry files by default. Those can be enabled on a per role
or per playbook basis.

ansible.cfg

@@ -6,6 +6,7 @@ remote_user = root
 nocows = 1
 roles_path = roles
 vault_password_file = misc/get-vault-pass.sh
+retry_files_enabled = False
 
 [ssh_connection]
 pipelining = True