LU-11684 config: fix conf-sanity test_123

LU-11684 config: fix conf-sanity test_123

conf_param parameters go into FSNAME-MDT/OST/client files
set_parm -P parameters go into "params"

Change the test to set the conf_param parameter files first
followed by the set_param -P parameters, since there may be
overlap.  In this case, the test infrastructure is using
conf_param to set jobid_var, and test_123 is using set_param.
This causes collision and occasional failure.

Test-Parameters: trivial testlist=conf-sanity

Signed-off-by: Ben Evans <bevans@cray.com>
Change-Id: I5cbdbaf6cc0c1c55a870bd587e89b2cbdaf77c29
Reviewed-on: https://review.whamcloud.com/33720
Tested-by: Jenkins
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>