use resourceNames instead of projectId for logging.entities.list

[bshaffer]

the projectIds field is being deprecated for entities.list in favor of resourceNames.

The projectIds field will eventually be removed, so we should update the LoggingClient to prepare for this change:

        $resourceNames = ['projects/' . $this->projectId];
        if (isset($options['projectIds'])) {
            foreach ($options['projectIds'] as $projectId) {
                  $resourceNames[] = 'projects/' . $projectId;
            }
        }
        if (isset($options['resourceNames'])) {
            $options['resourceNames'] = array_merge($resourceNames, $options['projectIds']);
        } else {
            $options['resourceNames'] = $resourceNames;
        }

[dwsupplee]

Thanks for the heads up @bshaffer

[dwsupplee]

Closed by #235