introduce Controller model
diff --git a/planetstack/core/models/slice.py b/planetstack/core/models/slice.py
index 6e1d163..8854a75 100644
--- a/planetstack/core/models/slice.py
+++ b/planetstack/core/models/slice.py
@@ -5,13 +5,13 @@
 from core.models.site import SitePrivilege
 from core.models import User
 from core.models import Role
-from core.models import Deployment,DeploymentLinkManager,DeploymentLinkDeletionManager
+from core.models import Controller,ControllerLinkManager,ControllerLinkDeletionManager
 from core.models import ServiceClass
 from core.models.serviceclass import get_default_serviceclass
 from core.models import Tag
 from django.contrib.contenttypes import generic
 from core.models import Service
-from core.models import Deployment
+from core.models import Controller
 from django.core.exceptions import ValidationError
 
 # Create your models here.
@@ -92,9 +92,9 @@
         from core.models.network import Network
         nets = Network.objects.filter(slices=self)
         nets.delete() 
-        # delete slice deployments
-        slice_deployments = SliceDeployments.objects.filter(slice=self)
-        slice_deployments.delete()
+        # delete slice controllers
+        slice_controllers = ControllerSlices.objects.filter(slice=self)
+        slice_controllers.delete()
         # delete slice privilege
         slice_privileges = SlicePrivilege.objects.filter(slice=self)
         slice_privileges.delete() 
@@ -128,26 +128,23 @@
             qs = SlicePrivilege.objects.filter(id__in=sp_ids)
         return qs
 
-class SliceDeployments(PlCoreBase):
-    objects = DeploymentLinkManager()
-    deleted_objects = DeploymentLinkDeletionManager()
+class ControllerSlices(PlCoreBase):
+    objects = ControllerLinkManager()
+    deleted_objects = ControllerLinkDeletionManager()
 
-    slice = models.ForeignKey(Slice, related_name='slicedeployments')
-    deployment = models.ForeignKey(Deployment, related_name='slicedeployments')
+    controller = models.ForeignKey(Controller, related_name='controllerslices')
+    slice = models.ForeignKey(Slice, related_name='controllerslices')
     tenant_id = models.CharField(null=True, blank=True, max_length=200, help_text="Keystone tenant id")
-    network_id = models.CharField(null=True, blank=True, max_length=256, help_text="Quantum network")
-    router_id = models.CharField(null=True, blank=True, max_length=256, help_text="Quantum router id")
-    subnet_id = models.CharField(null=True, blank=True, max_length=256, help_text="Quantum subnet id")
 
-    def __unicode__(self):  return u'%s %s'  % (self.slice, self.deployment)
+    def __unicode__(self):  return u'%s %s'  % (self.slice, self.controller)
 
     @staticmethod
     def select_by_user(user):
         if user.is_admin:
-            qs = SliceDeployments.objects.all()
+            qs = ControllerSlices.objects.all()
         else:
             slices = Slice.select_by_user(user)
-            qs = SliceDeployments.objects.filter(slice__in=slices)
+            qs = ControllerSlices.objects.filter(slice__in=slices)
         return qs    
 
     def get_cpu_stats(self):