Add duplicate detection for directory

[axelsiebert]

Changes

• Add detection for already existing Directory of an EHR
• Respond with 409 - CONFLICT in case of detected folder

Related issue

Fixes https://github.com/ehrbase/project_management/issues/231

Additional information and checks

• Pull request linked in changelog

[wlad]

@axelsiebert looks good. But seems we have no test that covers that case. We have a test that checks "validate POST response - 409 folder already exists" which is failing silently because it's marked as not-ready (it's related to https://github.com/ehrbase/project_management/issues/148)

I'm not sure if we need a new tests or have to refactor the existing one. We should should create a follow up ticket.

[axelsiebert]

@axelsiebert looks good. But seems we have no test that covers that case. We have a test that checks "validate POST response - 409 folder already exists" which is failing silently because it's marked as not-ready (it's related to ehrbase/project_management#148)

I'm not sure if we need a new tests or have to refactor the existing one. We should should create a follow up ticket.

Sorry I made a mistake with the description of changes. The response code will be 409 as you mentioned. Then the test could be marked as ready.