Consider adding some or all of the Jackson serialization utilities from consul-client

[sleberknight]

The consul-client library contains several Jackson serialization utilities (in the org.kiwiproject.consul.util package) which we should consider adding to kiwi. Before doing that we should verify they are (a) useful, (b) generic, and (c) don't exist in any common utility libraries. Points (a) and (b) must be true, but (c) doesn't necessarily have to be if they are useful enough, since adding them to kiwi avoids adding another new dependency.