If the server receives an auth request that uses saslStart and requires a saslContinue, but never runs saslContinue, then the server will count a received authentication, but not a successful one. There is at least one test that assumes this will never happen, and uses an equal number of received authentication attempts and successful authentication attempts as a metric for correctness. This/these test(s) should take this behavior into account.

Per sara.golemon:

> The right solution may be grabbing the auth stats right after rst.awaitSecondaryNodes(); and verify that speculative, cluster and total auths are all >= ($numberOfNodes - 1). Then trigger all host-connections to re-establish, and get mech stats, then make sure received and successful both went up (and by equal amounts).