API Documentare : example query shown in swagger

[JoelGardes]

I suggest to display a functionnal example on our server with:

• default values for clustering parameters,
• true directoires (for avoiding "mismatched" directories, create a kind of junk under /data-mylib, for example : /data-mylib/example)
• when launching server with SimdocServer: optional parameter indicating root directory for shared data (i.e. "/data-mylib" or other name depending client application, then by testing API with swagger, one can better understand used directories tree).

To be discussed.

[JoelGardes]

Principle of default parameters : if standard deviation, value 2, if percentile, 75 (last quartile method), il K, value 5.