Unnecessary processing of parameters in aggregations

[einorler]

There are two aggregations that have processArray() in their getArray() methods. These calls should be removed:

ElasticsearchDSL/src/Aggregation/DateHistogramAggregation.php

Line 85 in 1dc07a5

$out = $this->processArray($out);

ElasticsearchDSL/src/Aggregation/TopHitsAggregation.php

Line 139 in 1dc07a5

$output = $this->processArray($output);

[saimaz]

Indeed. Let's fix this.