update template name && add buffer_pool_instances into template

tasks/configure.yml

@@ -2,7 +2,7 @@
 - name: percona | configure Percona Server
   template:
     src: my.cnf.j2
-    dest: /etc/mysql/conf.d/01-ansible.cnf
+    dest: /etc/mysql/conf.d/01-override.cnf
     mode: '0644'
   notify: Restart Percona Server
 

templates/my.cnf.j2

@@ -26,6 +26,7 @@ table_definition_cache = {{ percona_table_definition_cache }}
 
 # InnoDB settings
 innodb_buffer_pool_size = {{ percona_innodb_buffer_pool_size }}
+innodb_buffer_pool_instances = {{ percona_innodb_buffer_pool_instances }}
 innodb_log_file_size = {{ percona_innodb_log_file_size }}
 innodb_log_buffer_size = {{ percona_innodb_log_buffer_size }}
 innodb_flush_log_at_trx_commit = {{ percona_innodb_flush_log_at_trx_commit }}