"Mapping image to local is not supported" error is returned by OpenStack when boot index is specified

[akanto]

Hi,

The boot_index is serialised as string by openstack4j, therefore starting from Kilo version we are getting back a "Mapping image to local is not supported" from OpenStack when block device mapping is specified.

{
  "server" : {
    "name" : "test",
     ...
    "block_device_mapping_v2" : [ {
     ...
      "boot_index" : "0",
      "delete_on_termination" : true
    } ]
  }
}

The boot_index shall be serialised as integer.

Thanks.