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[SP-785] Backport of PDI-10113

Conflicts:
	core/src/org/pentaho/di/core/vfs/KettleVFS.java
	engine/src/org/pentaho/di/trans/steps/textfileoutput/TextFileOutput.java
iSP-393 -Patch request for PDI-10242 - CSV Input Step - Unable to pass file encoding as parameter (5.0)

What was done :
1) changed the way get fields button initializes the process
Merge pull request #179 from kolinus/SP-393-rebased

SP-393 -Patch request for PDI-10242 - CSV Input Step - Unable to pass file encoding as parameter (5.0)
Merge pull request #172 from askdzmitry/SP-785

SP-785 Backport of PDI-10113 - Unable to output a text file using the 'S3 file output' step (5.0)