Issue #1380660 by loganfsmyth: Fixed field_available_languages() static cache never cleared.

core/modules/entity/tests/entity_query.test

@@ -1058,7 +1058,6 @@ class EntityFieldQueryTestCase extends DrupalWebTestCase {
     $this->fields[0]['cardinality'] = 1;
     field_update_field($this->fields[0]);
     field_test_entity_info_translatable('test_entity', TRUE);
-    drupal_static_reset('field_available_languages');
 
     // Create more items with different languages.
     $entity = new stdClass();
@@ -1096,7 +1095,6 @@ class EntityFieldQueryTestCase extends DrupalWebTestCase {
     $this->fields[0]['translatable'] = TRUE;
     field_update_field($this->fields[0]);
     field_test_entity_info_translatable('test_entity', TRUE);
-    drupal_static_reset('field_available_languages');
 
     // Create more items with different languages.
     $entity = new stdClass();

core/modules/field/field.info.inc

@@ -27,6 +27,7 @@
  */
 function field_info_cache_clear() {
   drupal_static_reset('field_view_mode_settings');
+  drupal_static_reset('field_available_languages');
 
   // @todo: Remove this when field_attach_*_bundle() bundle management
   // functions are moved to the entity API.

core/modules/field/tests/field.test

@@ -2679,7 +2679,7 @@ class FieldTranslationsTestCase extends FieldTestCase {
 
     // Test field_available_languages() behavior for untranslatable fields.
     $this->field['translatable'] = FALSE;
-    $this->field_name = $this->field['field_name'] = $this->instance['field_name'] = drupal_strtolower($this->randomName() . '_field_name');
+    field_update_field($this->field);
     $available_languages = field_available_languages($this->entity_type, $this->field);
     $this->assertTrue(count($available_languages) == 1 && $available_languages[0] === LANGUAGE_NONE, t('For untranslatable fields only LANGUAGE_NONE is available.'));
   }