Issue #2142549 by amateescu, yched: Support multi-column field types in base tables.

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

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

core/modules/forum/lib/Drupal/forum/Tests/ForumTest.php

.../Drupal/rdf/Tests/Field/TaxonomyTermReferenceRdfaTest.php

core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Term.php

...dules/taxonomy/lib/Drupal/taxonomy/TermFormController.php

.../modules/taxonomy/lib/Drupal/taxonomy/TermViewBuilder.php

...b/Drupal/taxonomy/Tests/TaxonomyTermReferenceItemTest.php

...s/taxonomy/lib/Drupal/taxonomy/Tests/TaxonomyTestBase.php

core/modules/taxonomy/lib/Drupal/taxonomy/Tests/TermTest.php

...s/taxonomy/lib/Drupal/taxonomy/Tests/TokenReplaceTest.php

core/modules/taxonomy/taxonomy.info.yml

core/modules/taxonomy/taxonomy.install

core/modules/taxonomy/taxonomy.pages.inc

core/modules/taxonomy/taxonomy.tokens.inc

core/modules/taxonomy/taxonomy.views.inc

...les/views/lib/Drupal/views/Tests/Plugin/RowEntityTest.php