Server-side image resizing does not preserver image ratio in case of outscaling

Reproduction steps:

• Upload an image of size 200x200
• Request the image with various parameters (e.g., http://localhost:8080/xwiki/bin/download/200/WebHome/200_200.png?width=*XXXX*&height=*YYYY*&rev=1.1)

Expected

• requesting 100x300 returns 66x200
• requesting 300x100 returns 200x600
• requesting 300x400 returns 150x200

(the request ratio is preserved to fit the max dimensions of the image)

Actual

• requesting 100x300 returns 100x200
• requesting 300x100 returns 200x100
• requesting 300x400 returns 200x200
  (basically the outscaled dimension is replaced by the original one without considering the ratio)