Also ass public_ipv6_address for ipv6 address management.
Extend nics and vlans for ipv6 address.
Add dependency to com.googlecode.ipv6(java-ipv6).
Modify dhcpcommand for ipv6.
Conflicts:
api/src/com/cloud/agent/api/routing/DhcpEntryCommand.java
pom.xml
server/src/com/cloud/configuration/ConfigurationManagerImpl.java
server/src/com/cloud/configuration/DefaultComponentLibrary.java
server/src/com/cloud/dc/VlanVO.java
server/src/com/cloud/network/NetworkManager.java
server/src/com/cloud/network/NetworkManagerImpl.java
server/src/com/cloud/network/NetworkVO.java
server/test/com/cloud/network/MockNetworkManagerImpl.java
server/test/com/cloud/network/MockNetworkModelImpl.java
server/test/com/cloud/vpc/MockNetworkManagerImpl.java