Updated openstack/openstack
Project: openstack-dev/devstack  c3fd0b5298110b4fc2a8d9fa7634ab1f493754a6

make get-pip.py download failures more clear

curl dying ends up being a really unclear failure condition, and
hard to fingerprint in the gate. We should make this much more
explicit when we die.

Also, don't trust the upstream filename, because all the rest of
our logic would break if it changes anyway.

Change-Id: Ibc2a96b33471d24c597af0d7af896fb10523156f