MAGETWO-90998: Extension developer has to specify all fields in order to extend content type.

- change groups test files to be singular

Author: krissyhiserote

dev/tests/integration/testsuite/Magento/PageBuilder/Model/Config/Group/ReaderTest.php

@@ -41,7 +41,7 @@ protected function setUp()
      */
     public function testPartial()
     {
-        $file = file_get_contents(__DIR__ . '/../../../_files/content_type/groups3.xml');
+        $file = file_get_contents(__DIR__ . '/../../../_files/content_type/group3.xml');
         $this->fileResolverMock->expects($this->once())
             ->method('get')
             ->willReturn([$file]);
@@ -51,9 +51,9 @@ public function testPartial()
     public function testMergeCompleteAndPartial()
     {
         $fileList = [
-            file_get_contents(__DIR__ . '/../../../_files/content_type/groups1.xml'),
-            file_get_contents(__DIR__ . '/../../../_files/content_type/groups2.xml'),
-            file_get_contents(__DIR__ . '/../../../_files/content_type/groups3.xml'),
+            file_get_contents(__DIR__ . '/../../../_files/content_type/group1.xml'),
+            file_get_contents(__DIR__ . '/../../../_files/content_type/group2.xml'),
+            file_get_contents(__DIR__ . '/../../../_files/content_type/group3.xml'),
         ];
         $this->fileResolverMock->expects($this->once())
             ->method('get')

dev/tests/integration/testsuite/Magento/PageBuilder/Model/Config/ReaderTest.php

@@ -59,9 +59,9 @@ protected function setUp()
     public function testMerge()
     {
         $groupsFileList = [
-            file_get_contents(__DIR__ . '/../../_files/content_type/groups1.xml'),
-            file_get_contents(__DIR__ . '/../../_files/content_type/groups2.xml'),
-            file_get_contents(__DIR__ . '/../../_files/content_type/groups3.xml')
+            file_get_contents(__DIR__ . '/../../_files/content_type/group1.xml'),
+            file_get_contents(__DIR__ . '/../../_files/content_type/group2.xml'),
+            file_get_contents(__DIR__ . '/../../_files/content_type/group3.xml')
         ];
         $contentTypesFiles = [
             file_get_contents(__DIR__ . '/../../_files/content_type/type1_content_type1.xml'),