StickyRoundRobinSelector starts with second host

[mariancerny]

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Summary of problem or feature request

When a list of multiple hosts is configured, randomizeHosts is disabled and StickyRoundRobinSelector is used the first connection goes to the second host (instead to the first one).

e.g. hosts:

• host1
• host2
• host3
• host4

Are tried in this order: host2, host3, host4, host1

Code snippet of problem

From StickyRoundRobinSelector::select():

    if ($connections[$this->current]->isAlive()) {
        return $connections[$this->current];
    }   

Because the first connection is not alive (yet), the first connection is skipped first time when select() is called.

System details

elasticsearch-php v7.10.0