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While deploying Rook, there can be issues when the environment is not
completely settled yet. On occasion the 1st kubectl command fails with
The connection to the server ... was refused - did you specify the right host or port?
This would set the 'ret' variable to a non-zero value, before the next
retry of the kubectl command is done. In case the kubectl command
succeeds, the 'ret' variable still contains the old non-zero value, and
kubectl_retry returns the incorrect result.
By setting the 'ret' variable to 0 before calling kubectl again, this
problem is prevented.
Signed-off-by: Niels de Vos <ndevos@redhat.com>