Description:
Changes to cover all the following GR helper exit scenarios.
1. Upon receiving max age grace lsa.( successful graceful restart)
2. Topo change
3. Grace timer expiry.
4. User changes( like config deletion , interface down)
Signed-off-by: Rajesh Girada <rgirada@vmware.com>
Description:
1. changes to process GRACE LSA packet.
2. Validation changes to enter Helper role.
3. Helper functionality during graceful restart.
Signed-off-by: Rajesh Girada <rgirada@vmware.com>