Because it's not possible to test the metadata service
code in an easy way, create a config drive ISO image for
test purposes.
Also speed up the metadata code to not block while waiting
for the metadata service and to exit quickly when there is
no config drive CD present.
Change-Id: If6a5565825b67de58715e3d2de1cbf69b7f9e551
It turns out that Kconfig actually needs the comments in the
config files to work properly, so add them back in.
Also add iproute2 support to busybox because it's very helpful
for debugging.
Change-Id: Ie6f7b61218bff135f0ac3ccba387e148019eed4f