PAL: Download .gz first

Change-Id: Ic83a63e5043ea1342b40e5b0aab189cfe24ba95c
Signed-off-by: Tibor Frank <tifrank@cisco.com>

# Please enter the commit message for your changes. Lines starting
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# Date:      Sun Mar 15 18:58:46 2020 +0100
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# On branch report-comparisons
# Changes to be committed:
#	modified:   resources/tools/presentation/input_data_files.py
#	modified:   resources/tools/presentation/specification.yaml
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