Remove placement_database related options/code

The placement_database config options were added in Newton
but the actual code to use the options was reverted and is
not used.

Change-Id: I97f44c0b52af6c356433cf2c1021e9c175a8710d
Depends-On: https://review.openstack.org/541685
Related-Reviews: I31293ac4689630e4113588ab2c6373cf572b8f38
Closes-Bug: #1670419

etc/openstack_deploy/user_secrets.yml

@@ -98,7 +98,6 @@ nova_metadata_proxy_secret:
 nova_service_password:
 nova_rabbitmq_password:
 nova_placement_service_password:
-nova_placement_container_mysql_password:
 
 # LXD Options for nova compute
 lxd_trust_password:

inventory/group_vars/nova_all.yml

@@ -60,9 +60,6 @@ nova_galera_address: "{{ galera_address }}"
 nova_api_galera_user: nova_api
 nova_api_galera_database: nova_api
 nova_api_galera_address: "{{ galera_address }}"
-nova_placement_galera_user: nova_placement
-nova_placement_galera_database: nova_placement
-nova_placement_galera_address: "{{ galera_address }}"
 nova_cell0_database: nova_cell0
 
 nova_external_ssl: "{{ openstack_external_ssl }}"

playbooks/os-nova-install.yml

@@ -66,15 +66,6 @@
         db_append_privs: "yes"
       run_once: yes
 
-    - name: Configure MySQL user (nova-placement)
-      include: common-tasks/mysql-db-user.yml
-      vars:
-        user_name: "{{ nova_placement_galera_user }}"
-        password: "{{ nova_placement_container_mysql_password }}"
-        login_host: "{{ nova_placement_galera_address }}"
-        db_name: "{{ nova_placement_galera_database }}"
-      run_once: yes
-
     - name: Configure MySQL user (nova-api cell0)
       include: common-tasks/mysql-db-user.yml
       vars: