Free the buffer allocated for shared_shaper_id array in
case of configuration without shared shapers.
Fixes: 996cb153af06 ("app/testpmd: add commands for TM nodes and hierarchy commit")
Signed-off-by: Nithin Dabilpuram <nithin.dabilpuram@caviumnetworks.com>
Acked-by: Jasvinder Singh <jasvinder.singh@intel.com>