UPSTREAM<carry>: etcdctl: fix move-leader for multiple endpoints

[tjungblu]

Due to a duplicate call of clientConfigFromCmd, the move-leader command would fail with "conflicting environment variable is shadowed by corresponding command-line flag". Also in scenarios where no command-line flag was supplied.

Signed-off-by: Thomas Jungblut [email protected]

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4.8 backport of #146 originally in etcd-io#14441

[openshift-ci]

@tjungblu: No Bugzilla bug is referenced in the title of this pull request.
To reference a bug, add 'Bug XXX:' to the title of this pull request and request another bug refresh with /bugzilla refresh.

In response to this:

UPSTREAM: etcdctl: fix move-leader for multiple endpoints

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[openshift-ci]

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[tjungblu]

confirmed it working on 4.8 with cluster bot too:

sh-4.4# etcdctl member list
94d75701cc4f18b5, started, ci-ln-f4jpnyt-72292-d99vj-master-0, https://10.0.0.4:2380, https://10.0.0.4:2379, false
de78b5a856ac0e99, started, ci-ln-f4jpnyt-72292-d99vj-master-1, https://10.0.0.5:2380, https://10.0.0.5:2379, false
e7084adbccd7a077, started, ci-ln-f4jpnyt-72292-d99vj-master-2, https://10.0.0.3:2380, https://10.0.0.3:2379, false
sh-4.4# etcdctl move-leader de78b5a856ac0e99
Leadership transferred from de78b5a856ac0e99 to de78b5a856ac0e99

[tjungblu]

/retest-required

[tjungblu]

this is confirmed for 3.4.21, so will leave the carry out for the proper rebase in https://issues.redhat.com/browse/OCPBUGS-1023

[openshift-ci]

@tjungblu: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/unit	7c81485	link	true	/test unit
ci/prow/e2e-aws-upgrade	7c81485	link	true	/test e2e-aws-upgrade

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[tjungblu]

closing this carry for the imminent rebase of 3.4.21