Temporary unavailable files injection fails if duplucates

[cserf]

Motivation

Traceback :

Details: [u'(cx_Oracle.IntegrityError) ORA-00001: unique constraint (ATLAS_RUCIO.BAD_PFNS_PK) violated']
Rucio exited with an unexpected/unknown error, please provide the traceback below to the developers.
Traceback (most recent call last):
  File "/usr/bin/rucio-admin", line 129, in new_funct
    return function(*args, **kwargs)
  File "/usr/bin/rucio-admin", line 1034, in declare_temporary_unavailable_replicas
    client.add_bad_pfns(pfns=chunk, reason=args.reason, state='TEMPORARY_UNAVAILABLE', expires_at=expiration_date)
  File "/usr/lib/python2.7/site-packages/rucio/client/replicaclient.py", line 336, in add_bad_pfns
    raise exc_cls(exc_msg)
RucioException: An unknown exception occurred.
Details: [u'(cx_Oracle.IntegrityError) ORA-00001: unique constraint (ATLAS_RUCIO.BAD_PFNS_PK) violated']