merge Amisha's changes
diff --git a/planetstack/core/models/slice.py b/planetstack/core/models/slice.py
index 7bffe83..d031766 100644
--- a/planetstack/core/models/slice.py
+++ b/planetstack/core/models/slice.py
@@ -24,6 +24,7 @@
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")
+ imagePreference = models.CharField(default="abc",null=True, blank=True, max_length=256)
service = models.ForeignKey(Service, related_name='service', null=True, blank=True)
tags = generic.GenericRelation(Tag)