FIX: add a few methods to the service
FIX: fix typo in FTSRequests
FIX: range for 2 DB items (12 digits)
FIX: don't include in the FTS request info the files that were set
staging
FIX: add caching of files being staged
FIX: do not report files being staged as being in the transfer
FIX: improve usage of sets
FIX: for wrongly formatted Adler cheksum
Merge pull request #1661 from phicharp/FixFTSforStaging-2

[v6r9] Fix fts for staging 2