[master] Minor fixes in scripts
- Protect against a (rare) exception opening XML summary in transformation-debug
- New script
dirac-wms-job-parameters
in LHCbDIRAC with better printout and new option --Parameter to select a (list of) parameter
dirac-wms-job-parameters
in LHCbDIRAC with better printout and new option --Parameter to select a (list of) parameter