[rest] set default url.prefix to specified at readme file (#1309)
[rest] set default url.prefix to specified at readme file (#1309)

Fix docs to give correct default port
ChristianNavolskyi/YCSB,brianfrankcooper/YCSB,ChristianNavolskyi/YCSB,brianfrankcooper/YCSB,brianfrankcooper/YCSB,ChristianNavolskyi/YCSB,ChristianNavolskyi/YCSB,brianfrankcooper/YCSB