Update NAT conntrack entries from natmgr instead of natorch#1274

Merged

arlakshm merged 4 commits intosonic-net:masterfrom

AkhileshSamineni:update_conntrack_entries

Jul 8, 2020

Commits on Apr 27, 2020

Update NAT conntrack entries from natmgr instead of natorch
AkhileshSamineni
committed

Commits on May 7, 2020

Updated the rate-limit value as per the "https://github.com/Azure/SONiC/blob/master/doc/nat/nat_design_spec.md"
AkhileshSamineni
committed

Commits on May 28, 2020

Reverted the copp json file changes as to addressing this issue in different PR.
AkhileshSamineni
committed

Commits on Jun 8, 2020

New testcase to verify the conntrack entries timeout
AkhileshSamineni
committed