Multiple documents output to api/Cake.Talend.Models/Executiontime/index.html (this probably wasn't intended)

@daveaglick while monitoring build logs during, I noticed this warning, something to worry about?
It doesn't fail the build, so everything seems to work, but maybe not as intended? 😉
```
Executing pipeline "RenderApi" (18/26) with 1 child module(s)
Multiple documents output to api/Cake.Talend.Models/Executiontime/index.html (this probably wasn't intended):
Cake.Talend.Models.TalendApiResponse.Executiontime
Cake.Talend.Models.Executiontime
Executed pipeline "RenderApi" (18/26) in 134888 ms resulting in 13474 output document(s)
```
Example:
https://ci.appveyor.com/project/cakebuild/website/build/1.0.1395#L461