test data import/export on files_primary_s3

[patrickjahns]

Description

Adds S3 as backend for unit/integration tests

Related Issue

#27

Motivation and Context

Test s3

How Has This Been Tested?

🤖

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• tests

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[patrickjahns]

@IljaN - how should we address this for acceptance tests - I believe its worthwhile for also having objecstorage tested

[phil-davis]

Integration test fail https://drone.owncloud.com/owncloud/data_exporter/433/105

[patrickjahns]

@IljaN @micbar - do you want to take over here?

[IljaN]

@patrickjahns We will, thanks for setting up 👍