Issue #2143263 by plopesc | yched: Remove "Field" prefix from FieldDefinitionInterface methods.

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

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

...Drupal/Core/Entity/FieldableDatabaseStorageController.php

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

core/lib/Drupal/Core/Entity/Query/Sql/Tables.php

core/lib/Drupal/Core/Field/ConfigFieldItemList.php

core/lib/Drupal/Core/Field/FieldDefinition.php

core/lib/Drupal/Core/Field/FieldDefinitionInterface.php

core/lib/Drupal/Core/Field/FieldItemBase.php

core/lib/Drupal/Core/Field/FieldItemList.php

core/lib/Drupal/Core/Field/FormatterBase.php

core/lib/Drupal/Core/Field/FormatterPluginManager.php

...re/Field/Plugin/Field/FieldType/LegacyConfigFieldItem.php

...ield/Plugin/Field/FieldType/LegacyConfigFieldItemList.php

core/lib/Drupal/Core/Field/WidgetBase.php

core/lib/Drupal/Core/Field/WidgetPluginManager.php

.../modules/aggregator/lib/Drupal/aggregator/Entity/Item.php

...ck/lib/Drupal/custom_block/Tests/CustomBlockFieldTest.php

...ock/lib/Drupal/custom_block/Tests/CustomBlockTypeTest.php

core/modules/comment/comment.module