CountryServiceTest: corrected name for a few tests.

Should be in 0fd5eedfe7b4f655720c77d608a28a97e9656a86 commit.

No functional changes.
SeriesServiceTest: corrected name for a few tests.

Should be in afe27ea220c816d1e098303046e9d86114f065dd commit.

No functional changes.
CustomUserDetails: corrected comment.

Should be in 493e36e7a5451e455fb3be44f3f3ae8740675676 commit.

No code changes.
CountryServiceMethodSecurityTest: don't pass real data to the service.

Allow test to fails with validation exception.

No functional changes.
Call AuthService.getCurrentUser() from controllers instead of inside services.

No functional changes.
CountryController: use domain converter instead of own service.

No functional changes.
CountryController: use NotFoundException for handling absent country.

Should be in 1bb56b927dafda1be4d913d7201043e850e77e2a commit.

No functional changes.
SeriesController: use domain converter instead of own service.

No functional changes.
CustomUserDetails: replaced getId() method by getUser().getId().

No functional changes.
CustomUserDetails: replaced getName() method by getUser().getName().

No functional changes.
ImageController: use domain converter instead of own service.

No functional changes.