MAGETWO-92929: Declarative schema tests are located in inappropriate place

- codestyle fixes

Author: rganin

lib/internal/Magento/Framework/Setup/Test/Unit/SchemaListenerTest.php

@@ -125,7 +125,7 @@ public function testCreateTable()
                         'nullable' => false,
                         'default' => 'CURRENT_TIMESTAMP',
                         'disabled' => false,
-                        'onCreate' => NULL,
+                        'onCreate' => null,
                     ],
                 'integer' =>
                     [
@@ -135,9 +135,9 @@ public function testCreateTable()
                         'unsigned' => false,
                         'nullable' => false,
                         'identity' => true,
-                        'default' => NULL,
+                        'default' => null,
                         'disabled' => false,
-                        'onCreate' => NULL,
+                        'onCreate' => null,
                     ],
                 'decimal' =>
                     [
@@ -147,9 +147,9 @@ public function testCreateTable()
                         'precision' => '25',
                         'unsigned' => false,
                         'nullable' => false,
-                        'default' => NULL,
+                        'default' => null,
                         'disabled' => false,
-                        'onCreate' => NULL,
+                        'onCreate' => null,
                     ],
             ],
             $tables['First_Module']['new_table']['columns']

lib/internal/Magento/Framework/Setup/Test/Unit/SchemaPersistorTest.php

@@ -143,6 +143,7 @@ public function schemaListenerTablesDataProvider()
                         ]
                     ]
                 ],
+                // @codingStandardsIgnoreStart
                 'XMLResult' => '<?xml version="1.0"?>
                         <schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
                             xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema.xsd">
@@ -161,6 +162,7 @@ public function schemaListenerTablesDataProvider()
                                 </index>
                             </table>
                         </schema>'
+                // @codingStandardsIgnoreEnd
             ]
         ];
     }