Consolidate short_help for classify table with memory-size
Consolidate short_help for classify table with memory-size

When creating 32K classify sessions, VPP crashes.
Default heap size is 2MB.
Need to configure it when requiring large number sessions.

Change-Id: I16678ee4a9e0ba61cbd2d3b38c43d10c59325968
Signed-off-by: Hongjun Ni <e6547d24d7149371d2bb4b8f7cc3ef66745c46d6@intel.com>

vpp-dev/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp