Issue #2382703 by phenaproxima, quietone, miguelc303, benjy: Migration Files for Drupal 7 Contact

core/modules/contact/config/schema/contact.schema.yml

core/modules/contact/config/schema/contact.source.schema.yml

.../modules/contact/migration_templates/contact_category.yml

...dules/contact/migration_templates/d6_contact_settings.yml

...dules/contact/migration_templates/d7_contact_settings.yml

...les/contact/src/Plugin/migrate/source/ContactCategory.php

...les/contact/src/Plugin/migrate/source/ContactSettings.php

.../contact/src/Tests/Migrate/MigrateContactCategoryTest.php

...ntact/src/Tests/Migrate/d6/MigrateContactCategoryTest.php

...ntact/src/Tests/Migrate/d6/MigrateContactSettingsTest.php

...ntact/src/Tests/Migrate/d7/MigrateContactSettingsTest.php

...ts/src/Unit/Plugin/migrate/source/ContactCategoryTest.php

...src/Unit/Plugin/migrate/source/d6/ContactSettingsTest.php

core/modules/migrate/src/Entity/Migration.php

core/modules/migrate_drupal/src/Tests/Table/d7/Variable.php