Fixed #5964 - Feature: Group IDs can be passed to User Create. (#5990)

Also added to update, and adjusted api tests to confirm.  Long term it
might be nice to look at support for passing group names instead.

Bug: 5964

database/factories/ModelFactory.php

@@ -45,6 +45,11 @@ $factory->define(App\Models\Component::class, function (Faker\Generator $faker)
     ];
 });
 
+$factory->define(App\Models\Group::class, function (Faker\Generator $faker) {
+    return [
+    'name' => $faker->name,
+    ];
+});
 
 $factory->define(App\Models\Location::class, function (Faker\Generator $faker) {
     return [