Camel ErrorHandler should check OUT message of exchange to see if it is a fault and print a warning message in the log

Linked to MR-460.

Setting both exception and fault message into Camel exchange isn't something that can be easily handleable or understandable. There are just too many variations possible to handle it in a single, understandable and uniform way. Therefore, we should let Camel ErrorHanlder to check OUT message of the camel exchange to see if it is a Fault or not. In case it is, then we should print out a WARNING message in the log to clearly indicate it.