tree b4038e179613430ccd430ca6a79c66fb94c6ad54
parent e8d897d329f6def7c231d48cebf4079ea0d4bfb4
author Monty Taylor <mordred@inaugust.com> 1372012982 -0400
committer Monty Taylor <mordred@inaugust.com> 1373832108 -0400

Be more agressive trying to install requirements.

When -r requirements.txt is used, either then entire file works
or the entire file doesn't. This means that if there is a hiccup
with any of the files, we lose the entire run instead of just
the one file.

By iterating over the list and installing as many as we can, then
processing the freeze, we get as many of them as we can.

This is especially helpful when combined with the upcoming pbr/jeepyb
gate, where the lack of a requirement in the gate will show up when
the thing that needs it can't install it. If we get everything else,
the error message in that case will be much more clear as to why.

Change-Id: I27606b92a8be2605fa30362aaab51e65a21770bc