ElasticPress timeout error is being caught twice

[owaincuvelier]

If an elasticsearch request times out, that error is correctly being caught and output to the PHP logs, but its being caught in two different places, causing noise in PHP logs.

1. caught in https://github.com/humanmade/altis-cloud/blob/master/inc/namespace.php#L385
2. also caught in https://github.com/humanmade/altis-enhanced-search/blob/master/inc/namespace.php#L388

If we can reduce the noise in the PHP logs that will make parsing errors easier for developers.

[kovshenin]

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