Committing DRBD work as it stands.
A lot of refactoring is still needed especially in the agent.
Test cases are most likely broken. They will need fixes.
Fix existing bosh director test cases after drbd changes.
Fixing test cases and disk migration for non-drbd partitions. More tests need to be added though.
Adding dns update functionality. As always will probably need more refactoring and definately more unit test work
Dirty horrible hack to get around dns properties not being passed to some jobs