Compilation fixes in dhcpv6_srv following recent changes in DHCPv6 Options.

src/bin/dhcp6/dhcp6_srv.cc

@@ -151,7 +151,7 @@ Dhcpv6Srv::processSolicit(boost::shared_ptr<Pkt6> solicit) {
         Option6IA* ia_req = dynamic_cast<Option6IA*>(tmp);
         if (ia_req) {
             boost::shared_ptr<Option6IA>
-                ia_rsp(new Option6IA(Option::V6, D6O_IA_NA, ia_req->getIAID()));
+                ia_rsp(new Option6IA(D6O_IA_NA, ia_req->getIAID()));
             ia_rsp->setT1(1500);
             ia_rsp->setT2(2600);
             boost::shared_ptr<Option6IAAddr>

src/bin/dhcp6/tests/dhcp6_srv_unittest.cc

@@ -83,7 +83,7 @@ TEST_F(Dhcpv6SrvTest, Solicit_basic) {
                                          1234, Pkt6::UDP));
 
     boost::shared_ptr<Option6IA> ia =
-        boost::shared_ptr<Option6IA>(new Option6IA(Option::V6, D6O_IA_NA, 234));
+        boost::shared_ptr<Option6IA>(new Option6IA(D6O_IA_NA, 234));
     ia->setT1(1501);
     ia->setT2(2601);
     sol->addOption(ia);