LU-15050 tests: do not ignore SANITY_ONLY and SANITYN_ONLY

LU-15050 tests: do not ignore SANITY_ONLY and SANITYN_ONLY

sanity 150[b,bb,c,d,f,g] and sanityn 107 tests are to be included
into SANITY_ONLY and SANITYN_ONLY lists only if these lists not
set by user.

Fixes: 3c75d2522786 ("LU-10664 dom: non-blocking enqueue for DOM locks")
Fixes: 163870abfb7c ("LU-14382 mdt: implement fallocate in MDC/MDT")
Test-Parameters: trivial testlist=sanity-dom env=SANITY_ONLY=1,SANITYN_ONLY=1
Signed-off-by: Elena Gryaznova <elena.gryaznova@hpe.com>
Change-Id: I686731df3dfbfe1b7d4ae2e8621d1b0c10c48a22
Reviewed-on: https://review.whamcloud.com/45107
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andriy Skulysh <andriy.skulysh@hpe.com>