MULE-6790: File transport sets the Directory attribute incorrectly

_ Adding two new inbound properties to the message when the connector uses workDirectory. Properties are sourceDirectory and sourceFileName
(cherry picked from commit efcbda8)
(cherry picked from commit a84a27d)
(cherry picked from commit 83190a687fd878847797b231bb84163748299325)
(cherry picked from commit 82cd634)