Issue #2141329 by tim.plunkett: Replace getAdminPath() with getAdminRouteInfo() in Field UI.

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

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

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

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

...comment/lib/Drupal/comment/Controller/AdminController.php

core/modules/field/lib/Drupal/field/Entity/FieldInstance.php

core/modules/field_ui/field_ui.module

.../modules/field_ui/lib/Drupal/field_ui/DisplayOverview.php

...ules/field_ui/lib/Drupal/field_ui/DisplayOverviewBase.php

...ules/field_ui/lib/Drupal/field_ui/FieldListController.php

core/modules/field_ui/lib/Drupal/field_ui/FieldOverview.php

core/modules/field_ui/lib/Drupal/field_ui/FieldUI.php

...les/field_ui/lib/Drupal/field_ui/Form/FieldDeleteForm.php

...dules/field_ui/lib/Drupal/field_ui/Form/FieldEditForm.php

...eld_ui/lib/Drupal/field_ui/Form/FieldInstanceEditForm.php

...ules/field_ui/lib/Drupal/field_ui/FormDisplayOverview.php

core/modules/field_ui/lib/Drupal/field_ui/OverviewBase.php