Logging mappable exception can be disabled

From version 2.3 every exception that is instance of MappableException or WebApplicationException is logged. When a service handle a lot of requests and some of those requests for example do not satisfy constraint validation then we can see in logs a lot of exceptions despite the fact that the service works fine. This pull request allows disabling logging of exceptions which are instance of MappableException or WebApplicationException through setting LOGGING_MAPPABLE_EXCEPTION_DISABLE property to true. Thanks this pull request logs can look clean when service works fine.