Fixes to regression code.

Were picking up wrong inputs
- rho
- hovere
Ensure that localhost is in the list of known hosts.

So that the reduction batch jobs are able to copy files.
Configuration for legacy_paper_reduction_8TeV_v4
Merge pull request #192 from musella/tagme_legacy_paper_reduction_8TeV_v4

Tag used for reduction legacy_paper/legacy_paper_reduction_8TeV_v4