vFW: Updating config and script files of vFW

vFW: Updating config and script files of vFW

JIRA: SAMPLEVNF-68

Updating the vFW Config and scripts with following:

 1. Remove arp/nd route tbl from cfg files
 2. Adding routeadd command to script file as route_tbl is
    removed from cfg files
 3. Remove ports_mac_list as the l2l3 stack will initialize
 4. Merge IPv4 and IPv6 cfg/tc files to reduce the number files
 5. Remove 1 WT cfg files to reduce too many cfg files.

Change-Id: If16ee740cd464f2cf55b8d11f590471aba9c7f30
Signed-off-by: Anand B Jyoti <anand.b.jyoti@intel.com>