Fix parameter names in Configuration

[szepeviktor]

Discovered by @phpstan

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@renepardon

[wing328]

cc
@jebentier (2017/07), @dkarlovi (2017/07), @mandrean (2017/08), @jfastnacht (2017/09), @ybelenko (2018/07), @renepardon (2018/12)

[wing328]

looks good, will update samples after merging this PR

[szepeviktor]

Glad to contribute.