[FEATURE REQUEST]: clean up temp when finishes

[fgvieira]

Is this a feature request for FCS-adaptor or FCS-GX?
FCS-adaptor

Describe the problem you'd like to be solved
FCS-adaptor writes temp files to $TMPDIR but does not cleanup when finishing, clogging up the temp folder.

Describe the solution you'd like
Clean up the temp files on (successful) exit.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.