FIX: create vomses and vomsdir when VOMS server are in /Registry/VO
Merge remote-tracking branch 'upstream/rel-v6r10' into bugfix_v6r10

Conflicts:
	Core/scripts/dirac-configure.py
BUGFIX: reformat
BUGFIX: Using set intersect operator, much faster.
BUGFIX: Using set intersect operator, much faster.
Merge pull request #1990 from graciani/bugfix_v6r10

[v6r10]: BES reported a slow behaviour of the search by FileMetadata