CWL: finalize runs for toil, cwltool, arvados
CWL: finalize runs for toil, cwltool, arvados

Provide easier run environments for tools using versions installed
with bcbio-vm. Simplifies shell script writing for running these.

vladsaveliev/bcbio-nextgen,a113n/bcbio-nextgen,a113n/bcbio-nextgen,lbeltrame/bcbio-nextgen,chapmanb/bcbio-nextgen,biocyberman/bcbio-nextgen,lbeltrame/bcbio-nextgen,brainstorm/bcbio-nextgen,brainstorm/bcbio-nextgen,brainstorm/bcbio-nextgen,lbeltrame/bcbio-nextgen,biocyberman/bcbio-nextgen,biocyberman/bcbio-nextgen,chapmanb/bcbio-nextgen,vladsaveliev/bcbio-nextgen,chapmanb/bcbio-nextgen,a113n/bcbio-nextgen,vladsaveliev/bcbio-nextgen