HPCC-9724 Default bundle directory should be per user

No good reason to have them shared, and solves a lot of problems.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #4658 from richardkchapman/bundle-directory-location

HPCC-9724 Default bundle directory should be per user

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>