[12346] Improve MMap File loading related log output

Log error of missing map files only if MMaps are active for this map
Log missing tiles only in debug mode (without LOG_FILTER_MAP_LOADING)

Thanks to qwertz1000 for pointing to problems
Signed-off-by: Schmoozerd <schmoozerd@cmangos>
[12347] Introduce new EventAI Error Log File. Update your config

You will now have an option called EventAIErrorLogFile in the config, in which you can store the name of the file for EventAI Errors.

Also there exists the config option LogFilter_EventAiDev with which the core can be tuned to be more chatty about EventAI