Merge pull request #773 from mulesoft/MULE-7642

MULE-7642: Fix FileExceptionStrategyFunctionalTestCase by allowing to ex...
(cherry picked from commit b66f38d3cb467059a9e75a116f3255a230bcbecb)

Conflicts:
	transports/file/src/main/java/org/mule/transport/file/ReceiverFileInputStream.java
	transports/file/src/test/java/org/mule/transport/file/FileMuleMessageFactoryTestCase.java