CCB: Fixes race condition in messagemeter.h

[LitvinenkoIra]

Bug Report

iOS/Android USB- Apps are not Unregistering

Detailed analysis:

Unprotected critical section accessed by two different threads,
timing_map is being modified by clearing the map identifiers causing a
crash in boost::date_time

Reproduction Steps

1. Connect an iOS device with Applink compatible Apps downloaded on to the phone to SYNC via USB
2. Verify the Apps Registration on SYNC
3. Unplug the device from SYNC

Expected Behavior

Apps should Unregister

Observed Behavior

Apps are not Unregistering

OS & Version Information

• OS/Version : SYNC4
• SDL Core Version: https://github.com/smartdevicelink/sdl_core/releases/tag/5.0.1
• Testing Against: SYNC4 Applink

[E-SAITO-TMC]

@joeygrover -san @theresalech -san This issue is a top priority for Toyota. Can the reproduction steps described actually reproduce this issue? Also, does this issue occur in the latest version?

[theresalech]

Hi @E-SAITO-TMC, we have documented that this is priority for Toyota, and will include for Steering Committee review and vote when planning the contents for the Q4 Core release. This planning will take place in June.
@LitvinenkoIra, can you please advise if the Luxoft team is seeing this issue in Core 6.1?

[LuxoftAKutsan]

@theresalech
Issue reproduced on SYNC version of SDL.
Issue is related to iOS device and can't be reproduced in open sdl environment.
Fix from SYNC ported to open : #3377

[jacobkeeler]

Closing with the merge of #3377