Issue #1857442 by longwave, dawehner: Make $values optional on entity_create.

core/includes/entity.inc

...lib/Drupal/Core/Config/Entity/ConfigStorageController.php

core/lib/Drupal/Core/Entity/DatabaseStorageController.php

...b/Drupal/Core/Entity/EntityStorageControllerInterface.php

...upal/Core/Entity/FieldableEntityStorageControllerBase.php

.../comment/Plugin/views/field/StatisticsLastCommentName.php

...omment/lib/Drupal/comment/Plugin/views/field/Username.php

...dules/config/lib/Drupal/config/Tests/ConfigEntityTest.php

...s/datetime/lib/Drupal/datetime/Tests/DateTimeItemTest.php

...odules/edit/lib/Drupal/edit/Tests/EditorSelectionTest.php

...ules/edit/lib/Drupal/edit/Tests/MetadataGeneratorTest.php

...es/editor/lib/Drupal/editor/Tests/EditIntegrationTest.php

...es/editor/lib/Drupal/editor/Tests/EditorFileUsageTest.php

core/modules/email/lib/Drupal/email/Tests/EmailItemTest.php

...Drupal/entity_reference/Tests/EntityReferenceItemTest.php

core/modules/field/lib/Drupal/field/Tests/CrudTest.php

core/modules/field/lib/Drupal/field/Tests/DisplayApiTest.php

...les/field/lib/Drupal/field/Tests/FieldAttachOtherTest.php

...s/field/lib/Drupal/field/Tests/FieldAttachStorageTest.php

core/modules/field/lib/Drupal/field/Tests/ShapeItemTest.php