Functional tests are failing for me (test_syncer.py) 
  File "/home/fabien/git/morucci/swiftsync/swsync/accounts.py", line 181, in process
    _targets_filters = self.get_target_tenant_filter()
  File "/home/fabien/git/morucci/swiftsync/swsync/accounts.py", line 66, in get_target_tenant_filter
    with open(tenant_filter_filename) as tenantsfile:
IOError: [Errno 2] No such file or directory: ''