Suppress update-ca-certificates skipped warning in the logs.
Suppress update-ca-certificates skipped warning in the logs.

This change will suppress the following warning message:
WARNING: ca-certificates.crt does not contain exactly one certificate or CRL: skipping

It's not actually an indication of a problem but it could distract a team member working on an incident.

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