Docker support: create external bcbio_nextgen.yaml
Docker support: create external bcbio_nextgen.yaml

External bcbio_nextgen.yaml file was not created on bcbio_vm.py
docker based installs due to checks. Loosen these to correctly
create. Thanks to @geetduggal

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