Adapt configuration group names to Yii conventions

[vjik]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	✔️
Fixed issues	yiisoft/app#271

[codecov]

Codecov Report

Base: 96.23% // Head: 96.23% // No change to project coverage 👍

Coverage data is based on head (30a9ad7) compared to base (be22286).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #187   +/-   ##
=========================================
  Coverage     96.23%   96.23%           
  Complexity      140      140           
=========================================
  Files            10       10           
  Lines           425      425           
=========================================
  Hits            409      409           
  Misses           16       16           

Impacted Files	Coverage Δ
config/di.php	0.00% <ø> (ø)

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