Patch from Robin Helgelin to wrap CVS calls inside a temporary directory.  One mailing list user had problems with CVS, which seems to write a .cvsignore file to disk even though we use -p to write to stdout. This seems to break running reviewboard under apache.
Patch from Robin Helgelin to wrap CVS calls inside a temporary directory.  One
mailing list user had problems with CVS, which seems to write a .cvsignore file
to disk even though we use -p to write to stdout. This seems to break running
reviewboard under apache.

I don't know whether this actually fixed the problem or not, I just wanted to
store the patch somewhere so it doesn't get lost.

Testing Done:
I've run the unit tests before and after, works without problems. I haven't been
able to receive the same problem as the original op, hence I have no idea
whether this actually changes anything :)

Reviewed at http://reviews.review-board.org/r/295/




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