Use same sample for Drakvuf and CAPE testing

CAPE and Drakvuf now use artifacts from different sample's reports to test their respective feature extractors. In the future we would like to use the same sample, analyze it with both CAPE and Drakvuf (and other future dynamic extractors), and use those reports for testing.

Start by locating the CAPE and Drakvuf feature-extractor tests and their current report artifacts. Trace how each test selects its sample, then make the shared sample and reports cover both extractors; done when both test paths analyze the same sample and still validate their respective extractors.

Written by the indexing model from the issue text.