Add required fields to POST /keys/upload

[S7evinK]

This adds the required fields to device_keys if they are missing. (the values probably don't make much sense)

[erikjohnston]

As per matrix-org/synapse#12081, this is failing because you're trying to upload a different key with the same key ID 🙂

[squahtx]

@S7evinK could you make the tests happy and also add a sign off (https://matrix-org.github.io/synapse/latest/development/contributing_guide.html#sign-off) ?

Also is the "Fix mistake" commit related to key upload?

[S7evinK]

I'm actually not sure how to fix this within Sytest. :/

Regarding the "Fix mistake": Not exactly related, but fixes an issue I introduced in #1195

[clokep]

Regarding the "Fix mistake": Not exactly related, but fixes an issue I introduced in #1195

This is likely best in a separate PR then!

I'm going to remove the review flag from Synapse since this:

• Needs to fix the tests (I'm not 100% sure what @erikjohnston is suggesting, but it sounds like you need to generate unique key IDs, maybe one for each test?)
• There's a conflict (probably from the path changes in Use /v3 endpoints #1200).

[richvdh]

Regarding the "Fix mistake": Not exactly related, but fixes an issue I introduced in #1195

this is fixed on develop already.

[S7evinK]

Not going to spend time on Sytest, so closing this.