LU-12474 tests: Do not run check_progs_installed for racer

LU-12474 tests: Do not run check_progs_installed for racer

it's run from within racer so racer is already there for sure

Lustre-change: https://review.whamcloud.com/35327
Lustre-commit: e7b7433571a748cdc651c5f50f01ff5ee0656c28

Change-Id: Ifd78cd051842c9663130b650c6e35d60332250e7
Test-Parameters: testlist=racer
Test-Parameters: trivial
Signed-off-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Reviewed-by: James Nunez <jnunez@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/37521
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>