Env vars to override concourse url and target name
Env vars to override concourse url and target name

By default the URL and target of concourse is generated based on the
deploy name and the system DNS name. But in some cases, specially during
testing and reviewing, it is convenient to be able to override both values.

jimconner/paas-cf,alphagov/paas-cf,jimconner/paas-cf,alphagov/paas-cf,alphagov/paas-cf,jimconner/paas-cf,alphagov/paas-cf,alphagov/paas-cf,jimconner/paas-cf,jimconner/paas-cf,alphagov/paas-cf,jimconner/paas-cf,alphagov/paas-cf,jimconner/paas-cf,alphagov/paas-cf