doc: update vagrant dev env instructions
doc: update vagrant dev env instructions

updating dev env Vagrant run instuctions to provide link on running
server with supervisord, since otherwise this can be found only on the
youtube video

Signed-off-by: Abhishek Lekshmanan <5398ff08dc5c8b48cf735a4ad1c69ee2f14865a6@ril.com>

r0h4n/ceph-integration