Report current task and progress

[JohnGarbutt]

Get logs out of ansible task and show some progress via the current task

[JohnGarbutt]

Talking about this, it would be good to report the task number (or name) it is currently on, so users see the progress.

[JohnGarbutt]

We do now show some tasks in the UI, and we do report some errors.

We should look at getting improved progress text, when available, from the ansible scripts.