[TASK] Activate mysql compat mode for 5.6

templates/default/my-5.7.cnf.erb

@@ -41,13 +41,15 @@ long_query_time = 3
 slow_query_log = 1
 slow_query_log_file = /var/log/mysql-default/log-slow-queries.log
 
+show_compatibility_56 = on
+
 [mysqldump]
 quick
 quote-names
-max_allowed_packet	= 128M
+max_allowed_packet = 128M
 
 [isamchk]
-key_buffer		= 32M
+key_buffer = 32M
 
 [mysql]
-default-character-set=utf8
+default-character-set = utf8