Move Zuul SQL connection to "database"

The sql connection is no longer supported, we need to use "database"
instead.  The corresponding hostvars change has already been made
on bridge.

Change-Id: Ibcac56568f263bd50b2be43baa26c8c514c5272b

inventory/service/group_vars/zuul.yaml

@@ -34,9 +34,6 @@ zuul_connections:
     user: 'openstack-zuul'
     sshkey: '/var/lib/zuul/ssh/id_rsa'
 
-  - name: 'mysql'
-    driver: 'sql'
-
   - name: 'github'
     driver: 'github'
     app_key: '/etc/zuul/github.key'

playbooks/roles/zuul/templates/zuul.conf.j2

@@ -40,6 +40,11 @@ session_timeout=40
 password={{ zuul_keystore_password }}
 {% endif -%}
 
+[database]
+{% if zuul_database_uri is defined -%}
+dburi={{ zuul_database_uri }}
+{% endif -%}
+
 [statsd]
 server=graphite.opendev.org
 

playbooks/zuul/templates/group_vars/zuul-scheduler.yaml.j2

@@ -111,3 +111,4 @@ zuul_ssh_private_key_contents: |
   TFg6lZUdaYGinDUAAAAfbW9yZHJlZEBNYWNCb29rLUFpci5sb2NhbGRvbWFpbgECAwQ=
   -----END OPENSSH PRIVATE KEY-----
 zuul_keystore_password: secretpassword
+zuul_database_uri: fakeuri