Fixed tests namespace

tests/Aggregation/CardinalityAggregationTest.php

tests/Aggregation/ChildrenAggregationTest.php

tests/Aggregation/DateRangeAggregationTest.php

tests/Aggregation/FilterAggregationTest.php

tests/Aggregation/FiltersAggregationTest.php

tests/Aggregation/GeoBoundsAggregationTest.php

tests/Aggregation/GeoDistanceAggregationTest.php

tests/Aggregation/GeoHashGridAggregationTest.php

tests/Aggregation/GlobalAggregationTest.php

tests/Aggregation/Ipv4RangeAggregationTest.php

tests/Aggregation/MissingAggregationTest.php

tests/Aggregation/NestedAggregationTest.php

tests/Aggregation/PercentileRanksAggregationTest.php

tests/Aggregation/PercentilesAggregationTest.php

tests/Aggregation/RangeAggregationTest.php

tests/Aggregation/ReverseNestedAggregationTest.php

tests/Aggregation/StatsAggregationTest.php

tests/Aggregation/TermsAggregationTest.php

tests/Aggregation/TopHitsAggregationTest.php

tests/Filter/AndFilterTest.php