fix template variables

Author: drupaladmin

templates/my.cnf.j2

@@ -79,7 +79,7 @@ thread_cache_size = {{ mysql_thread_cache_size }}
 query_cache_size = {{ mysql_query_cache_size }}
 max_connections = {{ mysql_max_connections }}
 tmp_table_size = {{ mysql_tmp_table_size }}
-max_heap_table_size = {{ max_heap_table_size }}
+max_heap_table_size = {{ mysql_max_heap_table_size }}
 
 # Other settings.
 wait_timeout = {{ mysql_wait_timeout }}