WMSClient creates just-in-time RPCClient
just removed useless import
FIX: port the fix to getReplicas from ReplicaManager to DataManager
FIX: LcgFileCatalogClient will now return an error when getting Replicas without good credentials
Merge pull request #1873 from chaen/rel-v6r11_FIX_Certification_vol4

[v6r11] Fix for DataManager and LcgFileCatalogClient
Merge pull request #1875 from fstagni/fixWMSClientInstantiation

[v6r11] WMSClient creates just-in-time RPCClient
v6r11-pre9
Conflicts resolved with rel-v6r11
v6r11-pre9