Fixed error in Galera SSL connection related task

(according to https://review.openstack.org/#/c/425997/)

Change-Id: I1cbee2de437284cbc241710aa4ace3d985e20574
Partial-Bug: #1667789

defaults/main.yml

@@ -83,10 +83,8 @@ nova_db_max_pool_size: 120
 nova_db_pool_timeout: 30
 # Toggle whether nova connects via an encrypted connection
 nova_galera_use_ssl: False
-# The path to where the database server CA certificate is stored
+# The path where to store the database server CA certificate
-nova_galera_ssl_ca_cert: /etc/ssl/certs/galera-ca.crt
+nova_galera_ssl_ca_cert: /etc/ssl/certs/galera-ca.pem
-# The path to a user-provided Galera CA certificate file on the deployment host
-#galera_user_ssl_ca_cert: /etc/openstack_deploy/files/galera-ca.crt
 
 ## DB API
 nova_api_galera_user: nova_api

tasks/nova_post_install.yml

@@ -25,34 +25,6 @@
     - nova-config
     - nova-post-install
 
-- name: Distribute self signed Galera ssl CA cert
-  copy:
-    dest: "{{ nova_galera_ssl_ca_cert }}"
-    content: "{{ hostvars[galera_cluster_members[0]]['galera_ssl_ca_cert_fact'] | b64decode }}"
-    owner: "root"
-    group: "{{ item.group|default(nova_system_group_name) }}"
-    mode: "0640"
-  when:
-    - nova_galera_use_ssl | bool
-    - galera_user_ssl_ca_cert is undefined
-  tags:
-    - nova-config
-    - nova-post-install
-
-- name: Distribute user provided Galera ssl CA cert
-  copy:
-    dest: "{{ nova_galera_ssl_ca_cert }}"
-    src: "{{ galera_user_ssl_ca_cert }}"
-    owner: "root"
-    group: "{{ item.group|default(nova_system_group_name) }}"
-    mode: "0640"
-  when:
-    - nova_galera_use_ssl | bool
-    - galera_user_ssl_ca_cert is defined
-  tags:
-    - nova-config
-    - nova-post-install
-
 - name: Generate nova config
   config_template:
     src: "{{ item.src }}"