The VRF part of test_05_blackbox_exporter_with_icmp moves blackbox-exporter into VRF bbx but keeps its listen-address (192.0.2.1) on a dummy interface in the default VRF, so the exporter can't bind and exits. The test only checks the generated setpriv settings, so it stays green even though the process is dead — the VRF/setpriv startup path isn't really covered.

Improve the test so it reflects reality:

• Put the listen-address inside the VRF so the exporter can actually bind (move dum3421 into bbx, or use a VRF-local address).
• Add a process_named_running assertion after the VRF commit.