LU-11669 tests: add project in yml_test_group()

LU-11669 tests: add project in yml_test_group()

This patch fixes yml_test_group() in yaml.sh to
add test project name, which is required in
results.yml for Maloo to parse.

This patch is back-ported from the following one:
Lustre-commit: 054bb02880d26bacc4e7080869955c2039bbf986
Lustre-change: https://review.whamcloud.com/33658

Test-Parameters: trivial

Change-Id: I0ae563d855dc2d28eaea85e86b1cb23d2428988b
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Leonel Ochoa <lochoa@whamcloud.com>
Reviewed-by: James Nunez <jnunez@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/38684
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>