Fix location of some of the commands in integrated config

Fix location of some of the commands in integrated config

Ticket:
Reviewed By: CCR-3509
Testing Done: bgpsmoke, enhe, tests with/without this change

When saving an integrated config file, certain commands such as
"ipv6 protocol", "ip nht route-map" etc. ended up with a very
different group of commands making it hard to look for them. This
fixes the command grouping so that related commands are located
together.

Signed-off-by: Dinesh G Dutt <ddutt@cumulusnetworks.com>
Reviewed-by: Donald Sharp <sharpd@cumulusnetworks.com>
Reviewed-by: Vipin Kumar <vipin@cumulusnetworks.com>