Multimaster

[gstanden]

• Elevates GRE host DNS/DHCP replicas to be able to assume HUB DNS/DHCP master role
• Improvements to dns-thaw service on DNS/DHCP
• Improvements to other DNS/DHCP replicate scripts

[gstanden]

• Merge multimaster DNS/DHCP replication enhancements in orabuntu code tree

[gstanden]

• Enhancements to LXC containerized DNS/DHCP replication