ci: Print playbook role execution times

tests/ansible/ansible.cfg

@@ -7,6 +7,8 @@ action_plugins = lib/action
 callback_plugins = lib/callback
 stdout_callback = yaml
 stdout_whitelist =
+    profile_roles,
+    timer,
     yaml
 vars_plugins = lib/vars
 library = lib/modules
@@ -33,6 +35,9 @@ timeout = 10
 # On Travis, paramiko check fails due to host key checking enabled.
 host_key_checking = False
 
+[callback_profile_tasks]
+task_output_limit = 10
+
 [ssh_connection]
 ssh_args = -o UserKnownHostsFile=/dev/null -o ForwardAgent=yes -o ControlMaster=auto -o ControlPersist=60s
 pipelining = True