Revert "use default or path-specific setting for cache replication level"
Revert "use default or path-specific setting for cache replication level"

This reverts commit ba6923b22356f0f4ea1206655e9a91627a2f3b9e.

chrislusf/seaweedfs,chrislusf/seaweedfs,chrislusf/seaweedfs,chrislusf/seaweedfs