Fixing broken 0.24.x tests in test/.

These tests once again largely were caused
by /usr/sbin not being in the path and by
~ not being writable.

The only tests still failing are Rails tests,
and my guess is that they're all failing because
of the recent work by Brice. They should probably
just be removed.

Signed-off-by: Luke Kanies <luke@madstop.com>