Add more information to lb-run --verbose

when invoked with --verbose, lb-run will print the versions and platforms used for each projects, as well as the full path to the .xenv files loaded.

Fixes LBCORE-1380

LbConfiguration/python/LbConfiguration/SP2/lookup.py

@@ -588,5 +588,4 @@ def getLHCbGrid(platform):
             if platform.split('-')[1] == os_id:
                 log.warning('using %s instead', platform)
                 break
-
     return version, platform