[Cinder] Update the image copy timeout to 20 hours
[Cinder] Update the image copy timeout to 20 hours

Customers are seeing create volume from image failures for
large volumes of 2Tb.   The current timeout is set to 6 hours, but
that is insufficient for a 2Tb volume, which should take around 18.5
hours.

This patch updates the timeout to 20 hours.

sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts