lack of LockFile to avoid reopen the same path at the same time

[zojw]

Open the same path twice cause manifest Corrupted

[INFO  photondb::page_store::manifest] roll manifest to "/tmp/cmp_test/MANIFEST_1"
[INFO  photondb::raw::tree_test] open table
[INFO  photondb::page_store::manifest] clean obsolete manifest: "/tmp/cmp_test/MANIFEST_1" , None
[INFO  photondb::page_store::manifest] set manifest to 1
thread 'photonio-worker/0' panicked at 'open manifest fail 1: Os { code: 2, kind: NotFound, message: "No such file or directory" }', photondb/src/page_store/manifest.rs:174:18