add mutex lock to update managedclusterlist

[coleenquadros]

No description provided.

[coleenquadros]

/test sonarcloud

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Maintainability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

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[coleenquadros]

/test test-e2e

[openshift-ci]

@coleenquadros: The following test 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/sonarcloud	4ef83c5	link	false	/test sonarcloud

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[coleenquadros]

/test test-e2e

[subbarao-meduri]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: coleenquadros, subbarao-meduri

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• OWNERS [coleenquadros,subbarao-meduri]

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