private long imageSize() {
            return (long)7.7; // return (long)VespaContainerImage.maxImageSize(hostedSystem, nodeType);
        }
Matches the internal repo implementation

@author hakonhall
@author musum
node-repository/src/test/java/com/yahoo/vespa/hosted/provision/autoscale/awsnodes/ReservedSpacePolicyImpl.java