VirtHCK: Allow to override UNIQUE_ID and QEMU_BIN with environment variables
VirtHCK: Allow to override UNIQUE_ID and QEMU_BIN with environment variables

Signed-off-by: Dmitry Fleytman <a8cf97adadec4e1b734a39bc5aea71b5741cfca1@daynix.com>

daynix/VirtHCK,sameehj/VirtHCK,igord-daynix/VirtHCK