Fix exitmap related bad relay tests

This ticket is a placeholder for going over other exitmap related tests (for checktest.py see legacy/trac#33663 (moved)) and document them while we are at it.

Trac:
Parent Ticket: legacy/trac#33180 (moved)

added GeorgKoppen202004 in Legacy / Trac component::metrics/consensus health in Legacy / Trac network-health in Legacy / Trac network-health-roadmap-2020Q1 in Legacy / Trac owner::gk in Legacy / Trac parent::33180 in Legacy / Trac points::1 in Legacy / Trac priority::medium in Legacy / Trac severity::normal in Legacy / Trac status::assigned in Legacy / Trac type::defect in Legacy / Trac labels

Trac:
Keywords: N/A deleted, GeorgKoppen202003 added

Moving my tickets to April where needed.

Trac:
Keywords: GeorgKoppen202003 deleted, GeorgKoppen202004 added

changed time estimate to 8h

mentioned in issue legacy/trac#33180 (moved)

moved from legacy/trac#33758 (moved)

added Bug label and removed 1 deleted label

removed 1 deleted label

moved to tpo/network-health/exitmap#6