Rephrase vdi_on_boot_mode_incompatible_with_operation error
Rephrase vdi_on_boot_mode_incompatible_with_operation error

Change the description of this XenAPI error, as now it is used for both
VMs and VDIs that have on_boot=reset.

Signed-off-by: Gabor Igloi <7535f5501fd71876c93d896691e178fd3a11cfbb@citrix.com>

srowe/xen-api,euanh/xen-api,srowe/xen-api,euanh/xen-api,euanh/xen-api,srowe/xen-api,srowe/xen-api,srowe/xen-api,euanh/xen-api,euanh/xen-api,euanh/xen-api