Remove $director.username and $director.password
Remove $director.username and $director.password

The $director.username and password accessors require that the BOSH
Director has already been deployed. This works with our clean install
and upgrade system specs, but does not with our certificate rotation
specs.

These accessors already exist in the form of a named manifest snippet.
This means by default our system specs will not exercise these
accessors, but they can be exercised manually with the example product.

pivotal-cf-experimental/ops-manager-example,pivotal-cf-experimental/ops-manager-example,pivotal-cf-experimental/ops-manager-example,pivotal-cf-experimental/ops-manager-example