Merge branch 'release/7.x-0.15' into develop
Removed inclusion of failing test to get work done.
Now we should fix the failing test.

Revert "Removed inclusion of failing test to get work done."
This reverts commit ec9b43344243ab4f939a5c1fc94b2f4bf7769eec.
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Make BibdkHoldings unit testable
Test updated
Test updated
Load neccesary methods for unit test
updated to version 7.x-0.16
Merge branch 'release/7.x-0.16'