Hadoop: increase image size to 4.5 GB

image/build.sh

@@ -8,5 +8,5 @@ touch -r ../deployments/hadoop-single/site.pp.tmpl ../site.pp
 sudo /usr/sbin/build-openstack-debian-image \
 	--release stretch \
 	--extra-packages acl,cloud-initramfs-growroot,default-jre-headless,git,gnupg,krb5-user,librarian-puppet,qemu-guest-agent,puppet \
-	--image-size 4 \
+	--image-size 4.5 \
 	--hook-script ./hadoop.sh 2>&1 | tee build-image.log