webos-ports-emulator-appliance: Include IMAGE_NAME in .vmdk, .ovf and VM name

* newer VirtualBox appends always increasing number when ovf with the same
  name is imported, but with older VirtualBox they have the same name.
  Add IMAGE_NAME to distinguish dev and enduser images and append suffix
  so it's clear from which jenkins or local build it was imported

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>