LU-16673 tests: add checking for user USER0

LU-16673 tests: add checking for user USER0

Add checking for user USER0 in tests 125, 154a, 154b.

Test-Parameters: trivial testlist=sanity env=ONLY="125 154a 154b"

Change-Id: Id42d4b6dca4c05757d02483ddedd65be55df96d6
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/50501
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Alex Deiter <alex.deiter@gmail.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>