Fix style && build

Fix integration-tests

update doc

Increase timeout to release the zookeeper Ephemeral nodes

Fix code comment

use PartitionManager

make integrations test passed

fix test_drop_replica

fix drop replica '/path/to/zk/' ending in '/' and update doc

fix removeReplicaByZKPath

fix bug: add zkpath empty judge

fix: rewrite code

delete useless code.

fix:ast fromat

fix bug

add test_drop_replica

add drop_replica doc

add drop databse checkAccess

refactor dropReplica

update tests

add static method StorageReplicatedMergeTree::dropReplicaByZkPath

update doc and delete useless code

fix conflict

fix doc

fix doc

fix StorageReplicatedMergeTree::dropReplica

fix bug

delete useless code