* Refactor labl api
move to the new program model
Signed-off-by: wang yan <wangyan@vmware.com>
* continue resolve review comments
Signed-off-by: Wang Yan <wangyan@vmware.com>
1. Fix#5102 by checking the existence of name when creating/editing replication rule
2. Add unique constraint to the name of replication policy and target
3. Fix bugs of testing library
Signed-off-by: Wenkai Yin <yinw@vmware.com>