CategoryController: remove dependency on SeriesService by moving showInfoBySlug() method

[0pdd]

The puzzle 927-dc17d3cc from #927 has to be resolved:

mystamps/src/main/java/ru/mystamps/web/feature/category/CategoryController.java

Line 88 in 6fc61a2

// @todo #927 CategoryController: remove dependency on SeriesService by moving showInfoBySlug() method

The puzzle was created by Slava Semushin on 16-Jun-19.

[mukeshk]

Is id duplicate of 1052?

[php-coder]

Is id duplicate of 1052?

No, they're about different classes: CategoryController vs CountryController but yes they are mostly identical.