LU-8078 iokit: correct obdfilter-survey output data format

A space is needed between min and max status numbers in the
obdfilter-survey script, otherwise plot-obdfilter can't parse
the summary file correctly, so that the related .dat files and
graphs can't be generated correctly.

Test-Parameters: trivial testlist=obdfilter-survey
Signed-off-by: Emoly Liu <emoly.liu@intel.com>
Change-Id: I5bf4790f2db1ee11cb6a7cc95d5527cb0d68e35a
Reviewed-on: http://review.whamcloud.com/19841


Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bobi Jam <bobijam@hotmail.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>

lustre-iokit/obdfilter-survey/obdfilter-survey

@@ -605,7 +605,7 @@ for ((rsz = $rszlo; rsz <= $rszhi; rsz*=2)); do
 						str=$(printf "%17s " SHORT)
 					fi
 				else
-					str=$(awk "BEGIN {printf \"[%7.2f,%7.2f] \",\
+					str=$(awk "BEGIN {printf \"[%7.2f, %7.2f] \",\
 					(${stats[1]} * $actual_rsz)/1024,\
 					(${stats[2]} * $actual_rsz)/1024; exit}")
 				fi