A list of hosts:port separated by ';' to the administration port of the
couchbase cluster. (ex: "host1;host2:9000;host3" would try to connect to host1 on port 8091, if that fails it'll connect to host2 on port
9000 etc). The hostname may also be specified as a URI looking like:
http://localhost:8091/pools
The type of the connection: * ConnectionType.BUCKET - NULL for bucket means
"default" bucket * ConnectionType.CLUSTER - the bucket argument ignored and all data commands will return LCB_NOT_SUPPORTED