Make script stable for issue 3674

[dboltovskyi]

Fix is related to #3822

This PR is [ready] for review.

Summary

It was found out 3674_2_HMI_starts_PTU_before_UpdateAppList.lua script sometimes may fail due to missing SDL.OnStatusUpdate notifications. This could happen only for HTTP policy flow. The reason of that was the fact that sometimes SystemRequest is sent from App before OnSystemRequest has been received from Core.

ATF version

develop

Changelog

• Added expectation on OnSystemRequest and followed sending of SystemRequest
• Clean up the code by deleting of not used function parameters

CLA

• [x] I have signed the CLA

[dboltovskyi]

@theresalech Please notice this PR is ready for Livio team review.