Fix showing empty rating at some points in time in rating chart

[Marc-Spector]

Closes #2548

[codecov]

Codecov Report

Merging #2551 (3756ab4) into develop (fe13e21) will increase coverage by 0.02%.
The diff coverage is 0.00%.

@@              Coverage Diff              @@
##             develop    #2551      +/-   ##
=============================================
+ Coverage      64.02%   64.04%   +0.02%     
- Complexity      4508     4510       +2     
=============================================
  Files            497      497              
  Lines          19381    19381              
  Branches        1115     1115              
=============================================
+ Hits           12408    12413       +5     
+ Misses          6349     6344       -5     
  Partials         624      624              

Impacted Files	Coverage Δ
...com/faforever/client/player/PlayerRatingChart.java	84.84% <0.00%> (ø)
...main/java/com/faforever/client/map/MapService.java	76.58% <0.00%> (+1.44%)	⬆️

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[Marc-Spector]

The only X point that will not display the rating is 0.

[Sheikah45]

This as implemented changes the date that the points on the graph are associated with which is not desirable.

[Sheikah45]

See above comment about changing date

[Marc-Spector]

I have not changed the code associated with the date. In the picture that you showed, I don't see any deviations. Everything is displayed correctly.

[Marc-Spector]

I checked the chart of the other 5 players. It's all right.

[Sheikah45]

I will double check but in the picture it shows the same date with different rating values. It might have been an overlap but I thought it wasn't. But will check again.

[Marc-Spector]

This is the expected behavior. This means that the player played several games that day. Please look at the chart for the last month (not all the time) for any player.

[Marc-Spector]

@Sheikah45 Could you review the PR?

[Sheikah45]

Yes I wanted to do another indepth check to make sure the data points don't change but haven't gotten around to it yet