Update the user migration to include missing fields.

To test:

• run the profile picture migration "drush mim drupalorg_migrate_user_picture_files"
• run the field collection migration "drush mim drupalorg_migrate_field_collection_contribution_role"
• reset the last imported user variable "drush state:set drupalorg_migrate.drupalorg_migrate_users_last_record 0 --input-format=integer"
• run the user migration "drush mim drupalorg_migrate_users"

migrations/drupalorg_migrate_contributor_role.yml

+id: drupalorg_migrate_contributor_role
+label: 'Drupal.org Contributor Role'
+migration_group: drupalorg_migrate
+# Commenting out the below will require the d7_file migration.
+#migration_tags:
+#  - Drupal 7
+#  - Content
+
+#deriver: Drupal\node\Plugin\migrate\D7NodeDeriver
+source:
+  plugin: d7_node
+  batch_size: 1000
+  node_type: contributor_role
+
+destination:
+  plugin: entity:node
+
+process:
+  type:
+    plugin: default_value
+    default_value: contributor_role
+  langcode:
+    plugin: default_value
+    source: language
+    default_value: "und"
+  title: title
+  uid:
+    plugin: migration_lookup
+    migration: drupalorg_migrate_users
+    source: node_uid
+  status: status
+  created: created
+  changed: changed
+  promote: promote
+  sticky: sticky
+
+  field_summary: field_summary
+  field_description: field_description
+  field_impact: field_impact
+  field_accountable_for: field_accountable_for
+  field_duration: field_duration
+  field_average_time: field_average_time
+  field_commitment_description: field_commitment_description
+  field_how_to_get_started: field_how_to_get_started
+  field_contribution_areas:
+    plugin: sub_process
+    source: field_contribution_areas
+    process:
+      target_id:
+        plugin: migration_lookup
+        migration: drupalorg_migrate_contribution_area
+        source: tid
+  field_leads_to:
+    plugin: sub_process
+    source: field_leads_to
+    process:
+      target_id:
+        plugin: migration_lookup
+        migration: drupalorg_migrate_contributor_role
+        source: target_id
+  # TODO add reference for contributor_task
+#  field_tasks:
+#    plugin: sub_process
+#    source: field_tasks
+#    process:
+#      target_id:
+#        plugin: migration_lookup
+#        migration: drupalorg_migrate_contributor_task
+#        source: target_id
+  field_required_skills:
+    plugin: sub_process
+    source: field_required_skills
+    process:
+      target_id:
+        plugin: migration_lookup
+        migration: drupalorg_migrate_contributor_skill
+        source: target_id
+  field_skills_learned:
+    plugin: sub_process
+    source: field_skills_learned
+    process:
+      target_id:
+        plugin: migration_lookup
+        migration: drupalorg_migrate_contributor_skill
+        source: target_id
+
+migration_dependencies:
+  optional:
+    - drupalorg_migrate_users
+    - drupalorg_migrate_contribution_area
+    - drupalorg_migrate_contributor_skill
+
+dependencies:
+  enforced:
+    module:
+      - drupalorg_migrate