refactor worker APi errors, remove folder broker

examples/worker/CMakeLists.txt

examples/worker/process_folder/CMakeLists.txt

examples/worker/process_folder/CMakeLists_separate.in

examples/worker/process_folder/Makefile.in

examples/worker/process_folder/check_linux.sh

examples/worker/process_folder/check_windows.bat

examples/worker/process_folder/process_folder.cpp

tests/automatic/worker/CMakeLists.txt

tests/automatic/worker/connect_multithread/CMakeLists.txt

tests/automatic/worker/connect_multithread/cleanup_linux.sh

.../automatic/worker/connect_multithread/cleanup_windows.bat

...omatic/worker/connect_multithread/content_multithread.cpp

tests/automatic/worker/connect_multithread/setup_linux.sh

tests/automatic/worker/connect_multithread/setup_windows.bat

...s/automatic/worker/next_multithread_folder/CMakeLists.txt

...automatic/worker/next_multithread_folder/cleanup_linux.sh

...omatic/worker/next_multithread_folder/cleanup_windows.bat

...orker/next_multithread_folder/next_multithread_folder.cpp

...s/automatic/worker/next_multithread_folder/setup_linux.sh

...utomatic/worker/next_multithread_folder/setup_windows.bat