fix bad exception name

ccnode/libvirtwrapper.py

@@ -284,7 +284,7 @@ class LibvirtStoragePool(StoragePool):
             data = self._lvpool_handle.name()
             if data:
                 name = data
-        except libvirtError:
+        except libvirt.libvirtError:
             pass
         return name
     
@@ -354,7 +354,7 @@ class LibvirtStorageVolume(StorageVolume):
             data = self._lvvol_handle.name()
             if data:
                 name = data
-        except libvirtError:
+        except libvirt.libvirtError:
             pass
         return name
     
@@ -364,7 +364,7 @@ class LibvirtStorageVolume(StorageVolume):
         capacity = None
         try:
             capacity = self._lvvol_handle.info()[1]
-        except libvirtError:
+        except libvirt.libvirtError:
             pass
         return capacity
     
@@ -374,7 +374,7 @@ class LibvirtStorageVolume(StorageVolume):
         allocated = None
         try:
             allocated = self._lvvol_handle.info()[2]
-        except libvirtError:
+        except libvirt.libvirtError:
             pass
         return allocated 
     
@@ -384,7 +384,7 @@ class LibvirtStorageVolume(StorageVolume):
         path = None
         try:
             path = self._lvvol_handle.path()
-        except libvirtError:
+        except libvirt.libvirtError:
             pass
         return path