Do not exit the loop over Completed jobs if accounting sending fails
If CPUTime is not set, set it to MaxCPUTime. This is a hack not to go
into the next major release.
Allow to specify jobs to delete by job group and/or in a file
Merge pull request #1350 from atsareg/fix-v6r7

Several fixes
v6r7p18
Conflicts resolved after merging with rel-v6r7
v6r7p18