Issue 308

[rhythnic]

What does this PR do?

• Support bulk import of devices; /api/applications/:id/import-devices
• Increment minor version for release candidates
• Update API for device.create and deviceNetworkTypeLink.create to accept data object instead of list of arguments.
• Add E2E test for bulk device import

Do you have any concerns with this PR?

The endpoint doesn't support file uploads. It's just JSON. I plan to parse the CSV file in the web client.

How can the reviewer verify this PR?

Test new endpoint

Any background context you want to provide?

The bulk import endpoint is designed to eventually support LoRa devices, but it doesn't yet.

Screenshots or logs (if appropriate)

Questions:

• Have you connected this PR to the issue it resolves? #308
• Does the documentation need an update? Yes
• Does this add new dependencies? No
• Have you added unit or functional tests for this PR? Yes