Ensure cores passed to docker container when running single multicore process. Fixes #20
Ensure cores passed to docker container when running single multicore process. Fixes #20

alexandrucoman/bcbio-nextgen-vm,brainstorm/bcbio-nextgen-vm,guillermo-carrasco/bcbio-nextgen-vm,fw1121/bcbio-nextgen-vm,alexandrucoman/bcbio-nextgen-vm,brainstorm/bcbio-nextgen-vm,fw1121/bcbio-nextgen-vm,chapmanb/bcbio-nextgen-vm,guillermo-carrasco/bcbio-nextgen-vm,chapmanb/bcbio-nextgen-vm