admin: Import exceptions from the same file

Use exceptions.py as the file to import admin exceptions from.

snf-admin-app/synnefo_admin/admin/resources/auth_providers.py

-import logging
 # Copyright (C) 2010-2014 GRNET S.A.
 #
 # This program is free software: you can redistribute it and/or modify
@@ -26,7 +25,7 @@ from astakos.im.models import AstakosUserAuthProvider
 from astakos.im.models import AstakosUser
 
 from eztables.views import DatatablesView
-from actions import AdminAction, AdminActionUnknown, AdminActionNotPermitted
+from actions import AdminAction
 
 templates = {
     'list': 'admin/auth_provider_list.html',

snf-admin-app/synnefo_admin/admin/resources/groups.py

@@ -26,8 +26,7 @@ from django.contrib.auth.models import Group
 from synnefo_admin.admin.exceptions import AdminHttp404
 
 from eztables.views import DatatablesView
-from synnefo_admin.admin.actions import (AdminAction, AdminActionUnknown,
-                                         AdminActionNotPermitted)
+from synnefo_admin.admin.actions import AdminAction
 
 templates = {
     'list': 'admin/group_list.html',

snf-admin-app/synnefo_admin/admin/views.py

@@ -41,7 +41,7 @@ from synnefo.admin import stats as cyclades_stats
 from synnefo_admin.admin.exceptions import AdminHttp404, AdminHttp405
 from synnefo_admin import admin_settings
 
-from synnefo_admin.admin import actions
+from synnefo_admin.admin import exceptions
 from synnefo_admin.admin.utils import (conditionally_gzip_page,
                                        customize_details_context, admin_log)
 
@@ -337,7 +337,7 @@ def admin_actions(request):
             status = 400
             response['result'] = e.message
             response['error_ids'].append(id)
-        except actions.AdminActionNotPermitted:
+        except exceptions.AdminActionNotPermitted:
             status = 403
             response['result'] = "You are not allowed to do this operation."
             response['error_ids'].append(id)
@@ -345,15 +345,15 @@ def admin_actions(request):
             status = 403
             response['result'] = "You are not allowed to do this operation."
             response['error_ids'].append(id)
-        except actions.AdminActionUnknown:
+        except exceptions.AdminActionUnknown:
             status = 404
             response['result'] = "You have requested an unknown operation."
             break
-        except actions.AdminActionNotImplemented:
+        except exceptions.AdminActionNotImplemented:
             status = 501
             response['result'] = "You have requested an unimplemented action."
             break
-        except actions.AdminActionCannotApply:
+        except exceptions.AdminActionCannotApply:
             status = 400
             response['result'] = """
                 You have requested an action that cannot apply to a target.