metrics: disable capture error logs

[cirocosta]

Hey,

Given that we have the ability to leverage Stackdriver's log-based metrics (see
#78 ), we might as well go forward with not leveraging the Concourse-based
conversion of error logs to metrics (concourse/concourse#2754) anymore (as
we'd never consume those from Prometheus - stackdriver would already give us).

To do so, we can disable it here:

hush-house/deployments/with-creds/hush-house/values.yaml

Line 76 in a14d083

metrics: { captureErrorMetrics: true }

hush-house/deployments/with-creds/ci/values.yaml

Line 95 in a14d083

metrics: { captureErrorMetrics: true }

ps.: this depends on #78.

Thanks!