ansible: Speedup playbook execution with pipelining

scripts/ansible/ansible.cfg

@@ -5,6 +5,9 @@ deprecation_warnings = false
 host_key_checking = false
 
 [ssh_connection]
+# Optimisation, speeds up playbook execution by reducing network round trips.
+# However, remote systems must not have requiretty set in /etc/sudoers.
+pipelining = true
 ssh_args =
     -o ForwardAgent=yes
     -o UserKnownHostsFile=/dev/null