David Turner 08a257327f
Remove newline from log message (#27425)
It leads to harder-to-parse logs that look like this:

```
  1> [2017-11-16T20:46:21,804][INFO ][o.e.t.r.y.ClientYamlTestClient] Adding header Content-Type
  1>  with value application/json
  1> [2017-11-16T20:46:21,812][INFO ][o.e.t.r.y.ClientYamlTestClient] Adding header Content-Type
  1>  with value application/json
  1> [2017-11-16T20:46:21,820][INFO ][o.e.t.r.y.ClientYamlTestClient] Adding header Content-Type
  1>  with value application/json
  1> [2017-11-16T20:46:21,966][INFO ][o.e.t.r.y.ClientYamlTestClient] Adding header Content-Type
  1>  with value application/json
```
2017-11-17 14:12:06 +00:00
..