Wang Zhiyong

meta 目录目前是隐藏状态，如果要清空数据，直接 rm * 是删不掉的。 最终导致数据被删了，但是meta数据仍在，然后启动报错，对于一般用户而言根本查不出哪里出了问题。

Reopen opt_rewrite_with_schema optimization rule

1

The opt_rewrite_with_schema optimization rule has bug, we temporarily disable it. Please fix and reopen it @seijiang

``` ==66887==ERROR: LeakSanitizer: detected memory leaks Direct leak of 160 byte(s) in 1 object(s) allocated from: #0 0x1c6d840 in operator new(unsigned long) ../../../../libsanitizer/asan/asan_new_delete.cc:90 #1 0x56aaab6 in cypher::ExecutionPlan::_BuildReturnOps(parser::QueryPart const&, cypher::PatternGraph const&,...