move function classes to analytics namespace (solariumphp#843)

Co-authored-by: Markus Kalkbrenner <markus.kalkbrenner@bio.logis.de>

Author: wickedOne

src/Builder/Analytics/ExpressionBuilder.php

@@ -5,8 +5,6 @@
 namespace Solarium\Builder\Analytics;
 
 use Solarium\Builder\ExpressionInterface;
-use Solarium\Builder\MappingFunction;
-use Solarium\Builder\ReductionFunction;
 
 /**
  * Expression Builder.

src/Builder/MappingFunction.php src/Builder/Analytics/MappingFunction.php

@@ -2,7 +2,11 @@
 
 declare(strict_types=1);
 
-namespace Solarium\Builder;
+namespace Solarium\Builder\Analytics;
+
+use Solarium\Builder\AbstractExpressionVisitor;
+use Solarium\Builder\ExpressionInterface;
+use Solarium\Builder\FunctionInterface;
 
 /**
  * Mapping Function.

src/Builder/ReductionFunction.php src/Builder/Analytics/ReductionFunction.php

@@ -2,8 +2,11 @@
 
 declare(strict_types=1);
 
-namespace Solarium\Builder;
+namespace Solarium\Builder\Analytics;
 
+use Solarium\Builder\AbstractExpressionVisitor;
+use Solarium\Builder\ExpressionInterface;
+use Solarium\Builder\FunctionInterface;
 use Solarium\Exception\RuntimeException;
 
 /**

tests/Builder/Analytics/FunctionBuilderTest.php

@@ -55,7 +55,8 @@ public function testCompositeReductionFunction(): void
         FunctionBuilder::create()
             ->where($expr->count(
                 $expr->missing('foo')
-            ));
+            ))
+        ;
     }
 
     /**