SDL doesn't wait for IsReady responses from HMI to send Ack or RAI response

[dboltovskyi]

Bug Report

SDL doesn't wait for IsReady responses from HMI to send Ack or RAI response

Reproduction Steps

1. Start SDL, HMI
   => SDL add all HMI capabilities to the cache.
2. Ignition Off
3. Start SDL, HMI
   => SDL sends a few <iface>.IsReady requests to HMI
4. HMI doesn't respond to requests
5. Connect mobile and register application
6. HMI responds to IsReady requests with some delay

Expected Behavior

SDL does wait for all IsReady responses from HMI and then sends RAI response to mobile

Observed Behavior

SDL sends RAI response right after obtaining HMI capabilities from cache

OS & Version Information

• OS/Version: Ubuntu 18.04
• SDL Core Version: https://github.com/smartdevicelink/sdl_core/tree/develop (c5a11df)
• Testing Against: ATF

Test Case, Sample Code, and / or Example App

• ATF Script: 3628_Postponed_RAI_protocol_4.lua.tar.gz
• Report and Logs: 2021-02-09_14-08-29.536_3628.tar.gz

[iCollin]

Closed via #3631