LU-5030 snmp: migrate lustre SNMP utilites to use cfs_get_paths

LU-5030 snmp: migrate lustre SNMP utilites to use cfs_get_paths

Move the SNMP lustre tools to use cfs_get_paths so
the tools function with the upstream client as well.

Change-Id: I18d76e10c45a9c8c582e77917a33bb2afa86aac4
Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Signed-off-by: Wang Chao <chao.ornl@gmail.com>
Reviewed-on: http://review.whamcloud.com/17465
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Emoly Liu <emoly.liu@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>