Problem: there was no way to get access to the t1 and t2 that the
dhcpv6 server send to the client
Solution: add the timing in the Prefix and Address set on the env
Issue: HOP-6080 - [DHCPv6Client] The HGW shall support Config datamodel
GitOrigin-RevId: 0792f7c9dbcd49d641003e808711e0c0413fc1bd