solutions/max_kaskevich/6: fixed some pull request issues.
solutions/max_kaskevich/6: replaced all indents(\t) with Allman style(4 spaces).
solutions/max_kaskevich/6/sources/multicast_communication/config_reader.cpp: fixed warning with to bool casting.
solutions/max_kaskevich/6/sources/thread_safe_queue/thread_safe_queue.h: fixed destructor, double disable_wait, and locking in enable_wait.