Stopped conditional discovery of gis_tests apps

Refs #23879.

tests/gis_tests/relatedapp/models.py

@@ -1,6 +1,7 @@
-from django.contrib.gis.db import models
 from django.utils.encoding import python_2_unicode_compatible
 
+from ..models import models
+
 
 class SimpleModel(models.Model):
 
@@ -8,6 +9,7 @@ class SimpleModel(models.Model):
 
     class Meta:
         abstract = True
+        required_db_features = ['gis_enabled']
 
 
 @python_2_unicode_compatible