Expose rucio API via DIRAC (DMS/Client/RucioClient.py)

[panta-123]

Dear ALL,
There are some Rucio API that can be useful for some workflows.
At Belle II we use:
(format: DIRACAPI->RucioAPI )

1. adRepRule -> add_rule : Create rules on datasets (LPN). A rule after created triggers replication and registeration automatically in rucio. This also sets lifetime (if wanted) on any manual replication rule created.
   Rather than doing replicate and registerReplica in DIRAC, this APi from rucio is asyncronous and automatic.

2. getRepStatus-> list_did_rules : To check the state of replicas (rule) . This provides more info like who owns the rule and lifetime of rule.

3. categoriesLPNs -> get_metadata_bulk (check did type of LPN and its child) : It is helpful to know if a LPN is one of the following:
   a. container of container
   b. container of dataset
   c. dataset
   d. file
   (More info about the terminology at: https://rucio.cern.ch/documentation/file_dataset_container/)

4. userQuota -> get_local_account_usage and get_global_account_usage : these gives the info about user's storage usages, limit and quota left.

We expose these API in: DMS/Client/RucioClient.py. We can make a pull-request to show the current implementation we have at Belle II.
These will be helpful to other comunnity using rucio via DIRAC.