refactor(core): Add fn get_organization to centurion mixin

Fn is required for perms to work correctly

ref: #870

app/core/mixins/centurion.py

@@ -196,6 +196,12 @@ class Centurion(
 
 
 
+    def get_organization(self):
+        """Return the objects organization"""
+        return self.organization
+
+
+
     def get_url(
         self, relative: bool = False, api_version: int = 2, many = False, request: any = None
     ) -> str:

app/itam/models/operating_system.py

@@ -136,11 +136,6 @@ class OperatingSystem(
         return self.name
 
 
-    def get_organization(self):
-
-        return self.organization
-
-
 
 class OperatingSystemVersion(
     CenturionModel

app/itam/models/software.py

@@ -274,9 +274,6 @@ class Software(
             self.organization = app_settings.global_organization
 
 
-    def get_organization(self):
-        return self.organization
-
 
 class SoftwareVersion(
     CenturionModel

app/itim/models/clusters.py

@@ -276,10 +276,6 @@ class Cluster(
     ]
 
 
-    def get_organization(self):
-        return self.organization
-
-
     @property
     def rendered_config(self):
 

app/itim/models/services.py

@@ -368,7 +368,3 @@ class Service(
             config.update(self.config)
 
         return config
-
-
-    def get_organization(self):
-        return self.organization