Merge branch 'release/0.12.28' into develop
Notify add/delete bucket to manager
Bump leo_commons
Update require_otp_vsn
Add the new feature(put_bucket with canned acl) part of issue#139
Support the mdc-replication#1
Change a data-type of return values
Revise user-table for the mdc-replication and modify data-transformer
Add an element of update-at in users-table
Add an element of delete-flag in buckets-table
Refactor entire modules and implement checksum-fun
Fix degrade codes
Add s3-related tables of checksum
Add a fun of find-all
Unified fun names
Update interface of return values of the checksum-fun
Implement a function of bulk-insert
Add a test-case in s3-user and s3-user-credential
Fix not set cluster-id in a bucket when updating it
Modify a fun of find-all in user-credential