Datadog: Rename consul host -> consul process
Datadog: Rename consul host -> consul process

The monitor was checking if the consul process was running. It was named as
if it was checking if consul hosts were running. Adjust check naming and
alert descriptions to reflect what the monitor is really checking.

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf