updates sample code in readme
updates sample code in readme

(cherry picked from commit 7cc1b76e9ccc4a5dc03f5c1904f7c100e1a1dacb)

naithar/Kitura,IBM-Swift/Kitura,naithar/Kitura,IBM-Swift/Kitura,naithar/Kitura,IBM-Swift/Kitura,naithar/Kitura,IBM-Swift/Kitura