Fix deduping on force update in Jason (#27)

[evdokimovs]

Part of #27

Synopsis

If answerer sends UpdateTrack before offerer sent his SDP offer, then Event order on the answerer side will be incorrect.

Steps to reproduce

Add some delay to the Event::TracksApplied handler with NegotiationRole::Offerer in the Jason.

1. Initial negotiation happened
2. Alice mutes video
3. Alice unmutes video
4. Bob mutes video
5. Alice sends SDP offer

What is the current bug behavior?

Alice's Sender will be muted.

What is the expected correct behavior?

Alice's Sender should be not muted.

Solution

Merge TrackPatches from the track_changes_queue with a TrackPatches from the pending_track_updates on force update.

Checklist

• Created PR:
  • [x] In draft mode
  • [x] Name contains Draft: prefix
  • [x] Name contains issue reference
  • [x] Has k:: labels applied
  • [x] Has assignee
• [x] Documentation is updated (if required)
• [x] Tests are updated (if required)
• [x] Changes conform code style
• [x] CHANGELOG entry is added (if required)
• [x] FCM (final commit message) is posted
  • [x] and approved
• [x] Review is completed and changes are approved
• Before merge:
  • [x] Milestone is set
  • [x] PR's name and description are correct and up-to-date
  • [x] Draft: prefix is removed
  • [x] All temporary labels are removed

[evdokimovs]

FCM

Fix deduping on force update in Jason (#134, #27)

[alexlapa]

@tyranron ,

Тревису что-то с пятницы очень плохо, давайте пока без CI мержить.

UPD: Спустя 4 часа CI таки докрутился.