DAOS-15651 control: fail fast on invalid rank for integrate

[cdavis28]

check rank against membership before issuing rank update for integrate.
Also fix a minor unit test bug related to getting syslog

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[cdavis28]

Moved from #14165

[github-actions]

Ticket title is 'dmg pool reintegrate with an invalid rank will timeout'
Status is 'Open'
https://daosio.atlassian.net/browse/DAOS-15651

[daosbuild1]

Test stage Functional Hardware Medium Verbs Provider completed with status FAILURE. https://build.hpdd.intel.com//job/daos-stack/job/daos/view/change-requests/job/PR-14213/1/execution/node/1497/log

[cdavis28]

I can't get the details on why those two tests failed. It leads to an Intel url that either is down or I simply don't have access to.
@jolivier23 @mjmac ideas?

[tanabarr]

looks like this failed on a known issue: DAOS_Rebuild_Simple so maybe unrelated to the PR?

[mjmac]

Yeah, my remote desktop connection is pretty flaky today, but I was able to determine that the failure seemed to be due to a missing cmocka file in the rebuild test suite. Definitely not related to this relatively small control plane change.

[cdavis28]

@mjmac is there someone we need to ping to make this happen?

[mjmac]

@mjmac is there someone we need to ping to make this happen?

Pinging @jolivier23... :)