MDEV-4786 - merge 10.0-monty - 10.0

Fixed maria.maria and funcs_1.is_tables failure.

sql/sql_table.cc:
  C_ALTER_TABLE_FRM_ONLY lost it's meaning after merge of inplace alter:
  now it is used even if table is to be copied.
  Otherwise: how can row format change go without notifying storage engine?
  Removed check for create_table_mode for now, to be discussed.

sql/sql_table.cc

@@ -4192,8 +4192,7 @@ handler *mysql_create_frm_image(THD *thd,
   set_table_default_charset(thd, create_info, (char*) db);
 
   db_options= create_info->table_options;
-  if (create_table_mode != C_ALTER_TABLE_FRM_ONLY &&
-      create_info->row_type != ROW_TYPE_FIXED &&
+  if (create_info->row_type != ROW_TYPE_FIXED &&
       create_info->row_type != ROW_TYPE_DEFAULT)
     db_options|= HA_OPTION_PACK_RECORD;