refactor(devops): Update all references to User to use get_user_model()

ref: #756 #755

app/devops/tests/functional/feature_flag/test_functional_feature_flag_viewset.py

@@ -1,6 +1,7 @@
+import django
+
 from django.contrib.auth.models import (
     Permission,
-    User,
 )
 from django.contrib.contenttypes.models import ContentType
 from django.test import TestCase
@@ -20,6 +21,7 @@ from itam.models.software import Software
 
 from settings.models.app_settings import AppSettings
 
+User = django.contrib.auth.get_user_model()
 
 
 

app/devops/tests/functional/software_enable_feature_flag/test_functional_software_enable_feature_flag_serializer.py

@@ -1,6 +1,6 @@
+import django
 import pytest
 
-from django.contrib.auth.models import User
 from django.test import TestCase
 
 from rest_framework.exceptions import ValidationError
@@ -13,6 +13,8 @@ from devops.serializers.software_enable_feature_flag import SoftwareEnableFeatur
 
 from itam.models.software import Software
 
+User = django.contrib.auth.get_user_model()
+
 
 
 class ValidationAPI(

app/devops/tests/functional/software_enable_feature_flag/test_functional_software_enable_feature_flag_viewset.py

@@ -1,6 +1,7 @@
+import django
+
 from django.contrib.auth.models import (
     Permission,
-    User,
 )
 from django.contrib.contenttypes.models import ContentType
 from django.test import Client, TestCase
@@ -22,6 +23,7 @@ from itam.models.software import Software
 
 from settings.models.app_settings import AppSettings
 
+User = django.contrib.auth.get_user_model()
 
 
 

app/devops/tests/unit/feature_flag/test_unit_feature_flag_api_v2.py

@@ -1,4 +1,6 @@
-from django.contrib.auth.models import Permission, User
+import django
+
+from django.contrib.auth.models import Permission
 from django.contrib.contenttypes.models import ContentType
 from django.shortcuts import reverse
 from django.test import Client, TestCase
@@ -15,6 +17,8 @@ from devops.models.feature_flag import FeatureFlag
 
 from itam.models.software import Software
 
+User = django.contrib.auth.get_user_model()
+
 
 
 class API(

app/devops/tests/unit/software_enable_feature_flag/test_unit_software_enable_feature_flag_api_v2.py

@@ -1,4 +1,6 @@
-from django.contrib.auth.models import Permission, User
+import django
+
+from django.contrib.auth.models import Permission
 from django.contrib.contenttypes.models import ContentType
 from django.shortcuts import reverse
 from django.test import Client, TestCase
@@ -15,6 +17,8 @@ from devops.models.software_enable_feature_flag import SoftwareEnableFeatureFlag
 
 from itam.models.software import Software
 
+User = django.contrib.auth.get_user_model()
+
 
 
 class API(