LU-13485 build: remove parallel configure dir

LU-13485 build: remove parallel configure dir

This patch removes the temporary directory for
parallel configure tests at the end of configure
to avoid checking the already generated modules
while configuring the same Lustre codes with
a different kernel.

Lustre-change: https://review.whamcloud.com/47077
Lustre-commit: 67da76f1a89b20e16da15aafab11ca2bb3779dc7

Change-Id: I4505fb932954531d262b5380f17b3df75a80bfa0
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/47735
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>