* provider/consul: first stab at adding prepared query support
* provider/consul: flatten pq resource
* provider/consul: implement updates for PQ's
* provider/consul: implement PQ delete
* provider/consul: add acceptance tests for prepared queries
* provider/consul: add template support to PQ's
* provider/consul: use substructures to express optional related components for PQs
* website: first pass at consul prepared query docs
* provider/consul: PQ's support datacenter option and store_token option
* provider/consul: remove store_token on PQ's for now
* provider/consul: allow specifying a separate stored_token
* website: update consul PQ docs
* website: add link to consul_prepared_query resource
* vendor: update github.com/hashicorp/consul/api
* provider/consul: handle 404's when reading prepared queries
* provider/consul: prepared query failover dcs is a list
* website: update consul PQ example usage
* website: re-order arguments for consul prepared queries
Previously the consul_keys resource did double-duty as both a reader and
writer of values from the Consul key/value store, but that made its
interface rather confusing and complex, as well as having all of the other
general problems associated with read-only resources.
Here we split the functionality such that reading is done with the
consul_keys data source while writing is done with the consul_keys
resource.
The old read behavior of the resource is still supported, but it's no
longer documented (except as a deprecation note) and will generate
deprecation warnings when used.
In future it should be possible to simplify the consul_keys resource by
removing all of the read support, but that is deferred for now to give
users a chance to gracefully migrate to the new data source.
Seth Vargo