Merge pull request #471 from magento-firedrakes/MTA-3802

Fixed issue:
- MTA-3802: Wrong fail of Magento Health Index - CHI: Undefined offset in ClassScanner.php

Author: MomotenkoNatalia

app/code/Magento/Catalog/Test/Unit/Model/Indexer/Product/Flat/FlatTableBuilderTest.php

@@ -141,7 +141,7 @@ public function testBuild()
                 [$tableName],
                 ['catalog_product_website']
             )
-            ->willReturn(
+            ->willReturnOnConsecutiveCalls(
                 $tableName,
                 'catalog_product_website'
             );
@@ -184,12 +184,12 @@ public function testBuild()
                 ],
                 [
                     $temporaryTableName,
-                    "e.{$linkField} = ${temporaryTableName}.{$linkField}",
+                    "e.{$linkField} = {$temporaryTableName}.{$linkField}",
                     [$linkField]
                 ],
                 [
                     $temporaryValueTableName,
-                    "e.${linkField} = " . $temporaryValueTableName . ".${linkField}",
+                    "e.{$linkField} = " . $temporaryValueTableName . ".{$linkField}",
                     [$linkField]
                 ]
             )->willReturnSelf();