Stopped conditional discovery of gis_tests apps

Refs #23879.

tests/gis_tests/geoadmin/models.py

@@ -1,7 +1,8 @@
-from django.contrib.gis import admin
-from django.contrib.gis.db import models
 from django.utils.encoding import python_2_unicode_compatible
 
+from ..admin import admin
+from ..models import models
+
 
 @python_2_unicode_compatible
 class City(models.Model):
@@ -12,6 +13,7 @@ class City(models.Model):
 
     class Meta:
         app_label = 'geoadmin'
+        required_db_features = ['gis_enabled']
 
     def __str__(self):
         return self.name