- add additional migration files

- add seeder for collections
- coverage x_min, x_max, y_min, y_max
- SitelinkController db-independent

database/seeds/RolesTableSeeder.php

@@ -181,6 +181,14 @@ class RolesTableSeeder extends Seeder
                 'permission_id' => '2', //permission 'page'
                 'role_id' => '1', //administrator role
             ],
+            [
+                'permission_id' => '3', //permission 'dataset-list'
+                'role_id' => '1', //administrator role
+            ],
+            [
+                'permission_id' => '4', //permission 'dataset-submit'
+                'role_id' => '1', //administrator role
+            ],
             [
                 'permission_id' => '3', //permission 'dataset-list'
                 'role_id' => '2', //submitter role