Merge pull request #567 from leider/master

admin list subscriptions now in groups and members api
Slightly reordering the admin member table.
The method should behave symmetrically for both arguments.
- Changed test from string list to array
- Added tests for string lists and arrays
- Generally grouped tests
Clarified Python version, fixed typo.
Merge pull request #568 from NicoleRauch/master

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