title: Drupal 8 - Node reference migrate to entity reference type
body: <p>I try to migrate drupal 7 site to version 8 following this steps <a href="https://www.drupal.org/docs/8/upgrade/upgrading-from-drupal-6-or-7-to-drupal-8" rel="nofollow noreferrer">https://www.drupal.org/docs/8/upgrade/upgrading-from-drupal-6-or-7-to-drupal-8</a>. But when migrate the fields of content types I get error of this type in fields that reference other content types "Attempt to create a [field_name] with no type.". "upgrade_d7_field" is the migration id I execute. I'm doing the migration via drush.</p>
  
  <p>I know the posible problem, but I dont know how to resolve. In drupal 7 the type of fields that reference other content types is the "Node reference" type, but in version 8 that type doesn't exist anymore, now is of type "entity reference".</p>
  
  <p>I think that I should change some configurations in my migration definition but I don't know exactly what.</p>
  
  <p>This is migration definition of the migration id "upgrade_d7_field":</p>
  
  <pre><code>uuid: 2edaccb2-22a6-4482-895f-439bbbc66f1a
  langcode: es
  status: true
  dependencies: {  }
  id: upgrade_d7_field
  class: Drupal\migrate_drupal\Plugin\migrate\FieldMigration
  field_plugin_method: alterFieldMigration
  cck_plugin_method: null
  migration_tags:
    - 'Drupal 7'
    - Configuration
  migration_group: migrate_drupal_7
  label: 'Field configuration'
  source:
    plugin: d7_field
    constants:
      status: true
      langcode: und
  process:
    entity_type:
      -
        plugin: get
        source: entity_type
    status:
      -
        plugin: get
        source: constants/status
    langcode:
      -
        plugin: get
        source: constants/langcode
    field_name:
      -
        plugin: get
        source: field_name
    type:
      -
        plugin: process_field
        source: type
        method: getFieldType
        map:
          d7_text:
            d7_text: d7_text
          taxonomy_term_reference:
            taxonomy_term_reference: taxonomy_term_reference
          image:
            image: image
          link_field:
            link_field: link_field
          file:
            file: file
          datetime:
            datetime: datetime
          list:
            list: list
    cardinality:
      -
        plugin: get
        source: cardinality
    settings:
      -
        plugin: d7_field_settings
  destination:
    plugin: 'entity:field_storage_config'
  migration_dependencies:
    required: {  }
    optional: {  }
  
  
  </code></pre>
  
  <p>Seriously I need migrate the data of the D7 site, they are more than 17.000 news with taxonomies, comments and more.</p>
  
  <p>I appreciate any help. Thanks in advance.</p>