Fix Device_number_test
Fix Device_number_test

We now always use xvd* to represent HVM devices. These device names are
converted into Xen values so this must be taken into account when
converting from old Ide values.

Signed-off-by: John Else <37b74501daa612e48fea94f9846ed4ddeb6a8f07@citrix.com>

xapi-project/message-switch,xapi-project/message-switch,euanh/xcp-idl,xapi-project/message-switch,johnelse/xcp-idl