openstacksdk produces task names that look like compute.DELETE.servers,
which are {service_type}.{METHOD}.{url}.{parts} but shade and nodepool
have been reporting to statsd with {Service_type}{Method}{Url}{Parts}.
Translate the task.name produced by sdk into the key nodepool expects to
report as.
Also, emit 'Manager ran task' log lines
The super class emits these, but on the openstacksdk logger. We don't
really want to turn that on at debug level for normal usage, so rather
than calling super(post_run_task) just straight-up override it.
Make sure we log using the transformed name in all cases.
Change-Id: I7f21aefc204366f7621643fdba76b7e70ce4caf5
67824d8e64