LU-13824 test: test sanity 230q with fewer files on ZFS

LU-13824 test: test sanity 230q with fewer files on ZFS

Sanity 230q may timeout on ZFS backend, test with fewer files.

Test-Parameters: trivial fstype=zfs testlist=sanity mdscount=2 mdtcount=4 env=ONLY=230q,ONLY_REPEAT=100
Signed-off-by: Lai Siyao <lai.siyao@whamcloud.com>
Change-Id: Iaf9e4e6d68244937819305af72df33e59df19f1f
Reviewed-on: https://review.whamcloud.com/39528
Reviewed-by: James Nunez <jnunez@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>