Adds SameHostFilter to default filters to allow users,
schedule instances based on `same_host` hint

Change-Id: I4ce208b6a8d5f2a9b12c8d9c13f0b07de1b0e33e
Related-Prod: PROD-16796
diff --git a/nova/control/cluster.yml b/nova/control/cluster.yml
index 3b8877d..f583156 100644
--- a/nova/control/cluster.yml
+++ b/nova/control/cluster.yml
@@ -24,7 +24,7 @@
       vncproxy_url: ${_param:nova_vncproxy_url}
       security_group: false
       dhcp_domain: novalocal
-      scheduler_default_filters: "DifferentHostFilter,RetryFilter,AvailabilityZoneFilter,RamFilter,CoreFilter,DiskFilter,ComputeFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,ServerGroupAntiAffinityFilter,ServerGroupAffinityFilter,PciPassthroughFilter,NUMATopologyFilter,AggregateInstanceExtraSpecsFilter"
+      scheduler_default_filters: "DifferentHostFilter,SameHostFilter,RetryFilter,AvailabilityZoneFilter,RamFilter,CoreFilter,DiskFilter,ComputeFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,ServerGroupAntiAffinityFilter,ServerGroupAffinityFilter,PciPassthroughFilter,NUMATopologyFilter,AggregateInstanceExtraSpecsFilter"
       cpu_allocation_ratio: ${_param:nova_cpu_allocation_ratio}
       ram_allocation_ratio: ${_param:nova_ram_allocation_ratio}
       disk_allocation_ratio: ${_param:nova_disk_allocation_ratio}