Use 'openstack_service_workers' as the nb of Cloudkitty workers

Add the ability to Kolla-ansible to manage the 'max_workers' parameter
 in Cloudkitty. We will use the 'openstack_service_workers' variable
 to control the number of workers that Cloudkitty is able to use.

Change-Id: I2f4e7e5c45d71a7e01d1b743d2eb4850cc339419
Signed-off-by: Rafael Weingärtner <rafael@apache.org>

ansible/roles/cloudkitty/defaults/main.yml

@@ -82,7 +82,6 @@ openstack_cloudkitty_auth: "{{ openstack_auth }}"
 ####################
 cloudkitty_openstack_keystone_default_role: "rating"
 
-
 ####################
 # Kolla
 ####################

ansible/roles/cloudkitty/templates/cloudkitty.conf.j2

@@ -56,3 +56,5 @@ port = {{ cloudkitty_api_port }}
 
 [orchestrator]
 coordination_url = mysql://{{ cloudkitty_database_user }}:{{ cloudkitty_database_password }}@{{ cloudkitty_database_address }}/{{ cloudkitty_database_name }}
+max_workers = {{ openstack_service_workers }}
+