feat: When attempting to create and objetc must be unique and alrready exists, dont return error return existing object

ref: #855

app/devops/viewsets/feature_flag.py

@@ -18,6 +18,10 @@ from api.viewsets.common import ModelViewSet
         summary = 'Create a Feature Flag',
         description='',
         responses = {
+            200: OpenApiResponse(
+                description='Already exists',
+                response = ViewSerializer
+            ),
             201: OpenApiResponse(description='Created', response=ViewSerializer),
             403: OpenApiResponse(description='User is missing add permissions'),
         }

app/devops/viewsets/git_group.py

@@ -22,6 +22,10 @@ from api.viewsets.common import ModelViewSet
         summary = 'Create a GIT Group',
         description='Create',
         responses = {
+            200: OpenApiResponse(
+                description='Already exists',
+                response = ViewSerializer
+            ),
             201: OpenApiResponse(
                 description='Created. Will be serialized with the serializer matching the provider.',
                 response = ViewSerializer

app/devops/viewsets/git_repository.py

@@ -60,6 +60,18 @@ from api.viewsets.common import (
             many = False,
         ),
         responses = {
+            200: OpenApiResponse(
+                description='Already exists',
+                response=PolymorphicProxySerializer(
+                    component_name = 'Git Provider',
+                    serializers=[
+                        GitHubViewSerializer,
+                        GitLabViewSerializer,
+                    ],
+                    resource_type_field_name=None,
+                    many = False,
+                ),
+            ),
             201: OpenApiResponse(
                 description='Created. Will be serialized with the serializer matching the provider.',
                 response=PolymorphicProxySerializer(

app/devops/viewsets/software_enable_feature_flag.py

@@ -17,6 +17,10 @@ from itam.models.software import Software
         summary = 'Enable Feature Flagging for Software',
         description='',
         responses = {
+            200: OpenApiResponse(
+                description='Already exists',
+                response = ViewSerializer
+            ),
             201: OpenApiResponse(description='Created', response=ViewSerializer),
             403: OpenApiResponse(description='User is missing add permissions'),
         }