LU-9669 tests: check required nrs availability on a facet

LU-9669 tests: check required nrs availability on a facet

sanityn/77[abcdefg], 78 failed with interop testing due to
missing nrs policy related proc entry's in OSS/MGS/MDS node.

Fix is to check for availabilty of a required nrs on a facet.
Patch removes tne versions based check from basic NRS policies
regression tests to make the possibility of interop testing with
old servers with NRS feature backported.

Author: Jadhav Vikram <jadhav.vikram@seagate.com>

Signed-off-by: Jadhav Vikram <jadhav.vikram@seagate.com>
Signed-off-by: Elena Gryaznova <c17455@cray.com>
Test-Parameters: trivial testlist=sanityn
Cray-bug-id: LUS-5259
Seagate-bug-id: MRP-3999
Reviewed-by: Vladimir Saveliev <c17830@cray.com>
Reviewed-by: Parinay Vijayprakash Kondekar <parinay.kondekar@seagate.com>
Change-Id: If0eca183ac388d481ddb3b1d39e0c9def5dd0c37
Reviewed-on: https://review.whamcloud.com/27660
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>