export uses $EXPORT_DIR for its temp space, but import uses /tmp

[jordane]

Most systems that have a separate /tmp mounted don't have the disk space in order to properly unpack and import an image in /tmp. The export script doesn't have this because it calls

TARGET=`mktemp -d --tmpdir=${EXPORT_DIR}`

while the import script calls

TARGET=`mktemp -d`

I'd like to change this anti-symmetry by doing one (and only one) of the following:

1. Change the import script to TARGET=mktemp -d --tmpdir=${EXPORT_DIR}``
2. Set IMPORT_DIR in common.sh and use that in the import script.

Thoughts?

[ramereth]

Yes, we should fix that.

[jordane]

@ramereth I'll generate a PR. Do you have a preference on IMPORT_DIR vs re-using EXPORT_DIR?

[ramereth]

@jordane let's go with IMPORT_DIR