Sweeping !1126 from master to devel: [master] Remove trailing whitespace and show lb-run command in std.out

Removes the pointless whitespace that can be seen when peeking the standard output or looking at std.out: https://lhcb-dirac-logse.web.cern.ch/lhcb/MC/2018/LOG/00146934/0002/00024686/std.out

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*WorkloadManagement FIX: Remove trailing whitespace and show lb-run command in std.out

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