Move file needed by cs_volume test to S3

There is a bad mirror missing the file and it is causing tests to fail.

test/integration/targets/cs_volume/defaults/main.yml

@@ -5,4 +5,4 @@ test_cs_instance_3: "{{ cs_resource_prefix }}-vm3"
 test_cs_instance_template: "{{ cs_common_template }}"
 test_cs_instance_offering_1: Small Instance
 test_cs_disk_offering_1: Custom
-test_cs_volume_to_upload: http://dl.openvm.eu/cloudstack/macchinina/x86_64/macchinina-xen.vhd.bz2
+test_cs_volume_to_upload: https://ansible-ci-files.s3.us-east-1.amazonaws.com/test/integration/targets/cs_volume/macchinina-xen.vhd.bz2