app/test: rename PCI blacklist test case

The current test_pci is just a single test case that tests the
blacklisting of devices. Rename it to test_pci_blacklist and call it
from the test_pci. The setup and cleanup are moved out of the
test_pci_blacklist entirely to cover all other tests.

Signed-off-by: Jan Viktorin <viktorin@rehivetech.com>