api: Implement storage_service::move
api: Implement storage_service::move

Start node 1 and node 2:

node 1:
$ scylla --initial-token 0

node 2:
$ scylla --initial-token 2000000

To move node 2 to a new token 8000000

$ curl -X POST --header "Content-Type: application/json" --header "Accept: application/json"
"http://127.0.0.2:10000/storage_service/move?new_token=8000000"

kjniemi/scylla,avikivity/scylla,raphaelsc/scylla,scylladb/scylla,kjniemi/scylla,avikivity/scylla,duarten/scylla,scylladb/scylla,duarten/scylla,scylladb/scylla,duarten/scylla,raphaelsc/scylla,kjniemi/scylla,raphaelsc/scylla,avikivity/scylla,scylladb/scylla