CHANGE: Use pythonCall to avoid time outs

Goes with #1452
dropped unused import
Fixes in the compatible metadata evaluation, added "path" argument to
getCompatibleMetadata
Removed unused import
Bug fixes after debugging
Added path argument to meta tags command
Removed debugging printout
Fixed docstring indentation and renamed XElement to X
minor bugfixes
FIX: wrong loop level
CHANGE: Backport from Integration

in the getFileUserMetadata, also get the directory metadata.
FIX: exit with -1 on Error
Merge remote-tracking branch 'upstream/rel-v6r7' into bug_fix_v6r7
NEW: getJobOutput() - return error message in case of globus-url-copy
error
Make LcgVer 2013-04-22 by default
Merge pull request #1457 from atsareg/fix-fc

FC: fixed logic of getting compatible metadata
Merge pull request #1460 from sposs/FCBackports

CHANGE: Backport from Integration
Merge pull request #1461 from graciani/bug_fix_v6r7

Bug fix v6r7
Merge pull request #1464 from atsareg/fix-v6r7

CREAM CE: check globus-url-copy errors when retrieving output
v6r7p29 notes