HPCC-10365 Regression suite requires non-existent directory

Fix directory checking

Signed-off-by: Attila Vamos <attila.vamos@gmail.com>
HPCC-10365 Regression suite requires non-existent directory

Update after review.

All regression session related output file stored into user's
"~/HPCCSystems-regression" directory.

Signed-off-by: Attila Vamos <attila.vamos@gmail.com>
Merge pull request #5108 from AttilaVamos/HPCC-10365-fix

HPCC-10365 Regression suite requires non-existent directory

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>