Corrects a typo in the description of parameters for the Register Entity API endpoint.
`Sample Respons` should be `Sample Response`.
This patch stores the datacenter of a node in memdb and exposes it via the API in all places where a Node structure is returned. * /catalog/nodes * /catalog/node/:node * /catalog/service/:service * /health/service/:service * /query/:uuid/execute
Elijah Caine