Shell out to tar when available for extraction [#79748612]

Signed-off-by: Amit Gupta <agupta@pivotallabs.com>
Remove windows conditionals from tests, and support symlinks in zips

Signed-off-by: Michael Fraenkel <fraenkel@us.ibm.com>
Test that tar compression respects symlinks

Signed-off-by: Michael Fraenkel <fraenkel@us.ibm.com>