Possibility to define a VO specific part
Bug fix: do not attempt to remove an empty list of replicas
Check for empty imput in checkArgumentFormat
__removeReplica() - do not attempt to remove an empty list of replicas
from catalog
Do not report successful removal of 0 files
Instantiate StorageElement with vo argument
Merge pull request #2181 from atsareg/fix-v6r12

[v6r12] VO specific Path in the SE protocol definition