Fix nits in function AddOrdererEndpoint
Fix nits in function AddOrdererEndpoint

Description

Fix nits in function AddOrdererEndpoint which were imported by
https://github.com/hyperledger/fabric/pull/857.

Signed-off-by: xu wu <c60e4b27187b49b5b8fbf6cee83a4ace6d9aabce@163.com>

stemlending/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,hyperledger/fabric,manish-sethi/fabric,stemlending/fabric,hyperledger/fabric,stemlending/fabric,manish-sethi/fabric-sidedb,stemlending/fabric,manish-sethi/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric-sidedb,jimthematrix/fabric,manish-sethi/fabric-sidedb,jimthematrix/fabric