SDL does not send BC.PolicyUpdate to HMI if no apps are registered

[ShobhitAd]

Bug Report

Currently, if there are no registered apps, triggering a PTU results in the HMI sending a BasicCommunication.OnSystemRequest with fileName: null.

The PTS filename is never set in the HMI because SDL does not send a BasicCommunication.PolicyUpdate request(which contains the PTS path) to the HMI. This prevents us from being able to use the HMI vehicle modem to handle the PTU if no apps are registered.

Reproduction Steps

Using the sdl hmi with external proprietary checked:

1. Build core with external proprietary
2. Start the policy server
3. Modify the 0x07 endpoint in the PT
4. Register app, successful PTU should occur
5. Unregister app
6. Change the kilometers to 5000 to trigger a PTU

Expected Behavior

1. SDL sends a BasicCommunication.PolicyUpdate request to the HMI.
2. The HMI sends a BasicCommunication.OnSystemRequest(PROPRIETARY) notification to SDL with a valid PTS fileName.

Observed Behavior

1. SDL does NOT send a BasicCommunication.PolicyUpdate request to the HMI.
2. The HMI sends a BasicCommunication.OnSystemRequest(PROPRIETARY) notification to SDL with fileName: null.

OS & Version Information

• OS/Version: Ubuntu 18.04
• SDL Core Version: origin/develop (94f92bb)
• Testing Against: Test Suite

[dboltovskyi]

@ShobhitAd If you don't mind we would like to help you with creating of ATF script for this issue. This will allow us not to face with such issue in future releases since this script will be included in our regression testing scope.

[ShobhitAd]

Closed via #3280

[ShobhitAd]

@dboltovskyi Sorry I just saw your comment. That sounds like a good idea. Please let me know when you make an ATF PR for testing this issue. Thanks 👍

[ShobhitAd]

Closed via #3294

[ShobhitAd]

Closed via #3363