GTNPORTAL-2988: Translation of navigation title doesn't work for language with country variant

Problem analysis:
	- Locale in User Context does not support country part

Fix description:
	- Get right locale string by using locale service.
GTNPORTAL-3061: Add UserConfigurableValidator for user's job title, user's display name and group label
GTNPORTAL-3061: Correct behaviour of UserConfigurableValidator