public Fixture.Builder awsSetup(boolean allowHostSharing, Environment environment) {
            return this.awsHostFlavors()
                       .awsResourceCalculator()
                       .awsZone(allowHostSharing, environment);
        }
Set to true to allow multiple nodes be provisioned on the same host.
node-repository/src/test/java/com/yahoo/vespa/hosted/provision/autoscale/Fixture.java