propagate extra child/plex library level study lims data to parent lane level

"alignment_in_bam" and "separate_y_chromosome" as is done with "contains_nonconsented_human" data
Merge remote-tracking branch 'wtsi-npg/devel' into devel
ensure consistent boolean response from plex/pool helper function
Merge pull request #204 from dkj/devel

propagate extra child/plex library level study lims data to parent/lane