Fix RabbitMQInstance serializer

feudal/backend/models/serializers/clients.py

@@ -2,14 +2,13 @@
 # pylint: disable=abstract-method
 
 from django_mysql.models import JSONField
-from rest_framework.serializers import ModelSerializer, DictField, ListField
+from rest_framework.serializers import Serializer, ModelSerializer, DictField, ListField, CharField
 from rest_polymorphic.serializers import PolymorphicSerializer
 
 from feudal.backend.models import Service
 from feudal.backend.models.users import User, SSHPublicKey
 from feudal.backend.models.deployments import Deployment, VODeployment, ServiceDeployment, DeploymentState, CredentialState
 from feudal.backend.models.auth.serializers.clients import VOSerializer
-from feudal.backend.brokers import RabbitMQInstance
 
 
 class ServiceSerializer(ModelSerializer):
@@ -49,12 +48,8 @@ class UserSerializer(ModelSerializer):
         ]
 
 
-class RabbitMQInstanceSerializer(ModelSerializer):
-    class Meta:
-        model = RabbitMQInstance
-        fields = [
-            'vhost',
-        ]
+class RabbitMQInstanceSerializer(Serializer):
+    vhost = CharField()
 
 
 DEPLOYMENT_FIELDS = (