Add Tenancy to Rack Reservations; Fixes #1592 (#1672)

* fixed prefix header to represent new serial "vlan_vid"

* shows option in creation now

* fixed visibility on rack page

* cleanup

* Added view to Tenant page

* Moved migration for update from #1666 and fixed tenant enumeration in FilterForm

* Fixed conflict #1

* Fixed filters from merge and made migration merge

* added tenant to api

* Fixed migrations problem

* Added Tenant to bulkedit option

netbox/dcim/models.py

@@ -417,6 +417,7 @@ class RackReservation(models.Model):
     rack = models.ForeignKey('Rack', related_name='reservations', on_delete=models.CASCADE)
     units = ArrayField(models.PositiveSmallIntegerField())
     created = models.DateTimeField(auto_now_add=True)
+    tenant = models.ForeignKey(Tenant, blank=True, null=True, related_name='rackreservations', on_delete=models.PROTECT)
     user = models.ForeignKey(User, on_delete=models.PROTECT)
     description = models.CharField(max_length=100)