VDI.epoch_begin: delete any leftover clone-on-boot VDI we may have
VDI.epoch_begin: delete any leftover clone-on-boot VDI we may have

Signed-off-by: David Scott <63c9eb0ea83039690fefa11afe17873ba8278a56@eu.citrix.com>

xapi-project/message-switch,xapi-project/message-switch,xapi-project/message-switch