use attributes instead of tags
use attributes instead of tags

these are more conventional for "dynamic" event data, whereas tags tend to be
more static and identify things for filtering (e.g. by deployment/job).

changed the riemann-boshrelease to convert these into datadog tags, since
datadog lets you break down by tag key:value pairs

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse