MBS-9327: Add unit test for backlink cache task#109

PhMemmel wants to merge 1 commit intomasterbycs-lp/mod_learningmap:masterfrom

MBS-9327-Fix-backlink-cache-task_with_unit_testbycs-lp/mod_learningmap:MBS-9327-Fix-backlink-cache-task_with_unit_testCopy head branch name to clipboard