LU-6863 tests: change obdfilter-survey.sh for CLIENTONLY mode

LU-6863 tests: change obdfilter-survey.sh for CLIENTONLY mode

obdfilter-survey.sh requires server access and can not be
used for CLIENTONLY mode:
get_devs $oss -> do_nodes $oss "lctl dl"
host_nids_address $oss -> do_nodes $oss "$LCTL list_nids"
Patch fixes the script to compose the targets list
without access to servers.

Test-Parameters: trivial testlist=obdfilter-survey
Signed-off-by: Elena Gryaznova <c17455@cray.com>
Cray-bug-id: MRP-1757
Reviewed-by: Alexey Lyashkov <c17817@cray.com>
Reviewed-by: Vitaly Fertman <c17818@cray.com>
Change-Id: I910afc940a29ea4f5d8928131652f9b6ef809ce7
Reviewed-on: https://review.whamcloud.com/15631
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>