Use openstack_service_workers variable in gate

set openstack_service_workers to 1 in gate.

Closes-Bug: #1640416
Change-Id: I59560fd543f25e0b60b3f11f1c941adf595b3131

tools/deploy_aio.sh

@@ -77,31 +77,13 @@ neutron_external_interface: "fake_interface"
 enable_horizon: "no"
 enable_heat: "no"
 openstack_logging_debug: "True"
+openstack_service_workers: "1"
 EOF
 
     mkdir /etc/kolla/config/nova
     cat << EOF > /etc/kolla/config/nova/nova-compute.conf
 [libvirt]
 virt_type=qemu
-EOF
-
-    cat << EOF > /etc/kolla/config/nova.conf
-[DEFAULT]
-osapi_compute_workers = 1
-
-[conductor]
-workers = 1
-EOF
-
-    cat << EOF > /etc/kolla/config/glance.conf
-[DEFAULT]
-workers = 1
-EOF
-
-    cat << EOF > /etc/kolla/config/neutron.conf
-[DEFAULT]
-api_workers = 1
-metadata_workers = 1
 EOF
 }