Enable SameHostFilter and DifferentHostFilter

The default filters of nova don't contain SameHostFilter and
DifferentHostFilter, so we cannot test them on the gate.
This patch makes these filters available for the development.

Change-Id: Ia6b4847e9bb21048d254d0a460ae4c5be896b17b
Closes-Bug: #1526620

Author: Ken'ichi Ohmichi

lib/nova

@@ -98,6 +98,10 @@ FORCE_CONFIG_DRIVE=${FORCE_CONFIG_DRIVE:-"True"}
 # should work in most cases.
 SCHEDULER=${SCHEDULER:-nova.scheduler.filter_scheduler.FilterScheduler}
 
+# The following FILTERS contains SameHostFilter and DifferentHostFilter with
+# the default filters.
+FILTERS="RetryFilter,AvailabilityZoneFilter,RamFilter,DiskFilter,ComputeFilter,ComputeCapabilitiesFilter,ImagePropertiesFilter,ServerGroupAntiAffinityFilter,ServerGroupAffinityFilter,SameHostFilter,DifferentHostFilter"
+
 QEMU_CONF=/etc/libvirt/qemu.conf
 
 # Set default defaults here as some hypervisor drivers override these
@@ -507,6 +511,7 @@ function create_nova_conf {
     iniset $NOVA_CONF DEFAULT api_paste_config "$NOVA_API_PASTE_INI"
     iniset $NOVA_CONF DEFAULT rootwrap_config "$NOVA_CONF_DIR/rootwrap.conf"
     iniset $NOVA_CONF DEFAULT scheduler_driver "$SCHEDULER"
+    iniset $NOVA_CONF DEFAULT scheduler_default_filters "$FILTERS"
     iniset $NOVA_CONF DEFAULT dhcpbridge_flagfile "$NOVA_CONF"
     iniset $NOVA_CONF DEFAULT force_dhcp_release "True"
     iniset $NOVA_CONF DEFAULT default_floating_pool "$PUBLIC_NETWORK_NAME"