when need to implement the recovery test for all the persistent structures to achieve code complete. in this PR:
1 refined the existing shard test case
2 enabled the disabled test case before adopting homestore 6.4
3 add pg recover test, since other recovery cases are already covered by the existing test code. shard recovery is in shard test case, and blob/index recovery is in blob test case.
when need to implement the recovery test for all the persistent structures to achieve code complete. in this PR: 1 refined the existing shard test case 2 enabled the disabled test case before adopting homestore 6.4 3 add pg recover test, since other recovery cases are already covered by the existing test code. shard recovery is in shard test case, and blob/index recovery is in blob test case.