Investigate support for creation of multiple repositories per outermost API call

[artem-v-shamsutdinov]

Right now AIRport limits creation of Repositories to one per outermost API call (including all calls to APIs of other Apps). This is tracked through IRootTransaction.newRepository. This leads to focused operations, where one App creates a Repository and then other Apps may may calls that add data to that Repository. However this also limits ability to create multiple related Repositories at the same time.

Note that you can still update records to other Repositories (thus moving them between Repositories) and you can add (create) records in other existing Repositories. There are no limitations on how many existing Repositories are used for those operations.

After initial internal and 3rd party Apps are written investigate if this limitation needs to be adjusted (by perhaps allowing one Repository per Dao.save call).