+ test resources to test import functionality
Refs: #18169
+ csv import test resources are moved to a folder
+ test is updated to use unitils reflection assert to make it easier to compare (because dbunit compare and spring-dbunit annotations didnt work)
+ code formatting
Refs: #18169
+ Trim to null added to vocabulary concept update part (otherwise it caused empty strings)
+ Base csv file is added so one can compare and see what to expect for steps
+ Test case foundation has been set up
Refs: #18169