OE-Core's commit 929ba563f1bc7195c4981b8e139c432b2cc388ea removed
image-vm.bbclass. Images were not tested but if the commit message was read
properly, the image creation job should be done by replacing image-type vdmk
by wic.vmdk.
Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
