Make function return types explicit: y_random_string_buffer_core()
Make function return types explicit: y_loadrunner_utils.c
Make function return types explicit: y_logging.c
Make function return types explicit: y_string.c

Another 10 functions updated ..
Make function return types explicit: y_transaction.c

4 more functions prototypes fixed ..
Fix a compile error resulting from the previous changes ..
Surpress a compile warning by switching y_save_attribute with y_save_attribute_to_parameter()
y_setup_browser_emulation_from_param() should not advance hardcoded parameter names.
Supress a compilation warning due to our use of const char* for parameters ..