Make internal cc dns name configurable

[c0d1ngm0nk3y]

Are you submitting this PR against the develop branch?

Yes

What is this change about?

Make the reference to the internal address of the cloudcontroller (cloud-controller-ng.service.cf.internal) configurable. This makes it possible to reuse the ASG test if you have another internal domain (e.g. kind)

Please provide contextual information.

Enable for include_security_groups kind. The default is the old hardcoded value, so no user has to change anything.

What version of cf-deployment have you run this cf-acceptance-test change against?

Please check all that apply for this PR:

• introduces a new test --- Are you sure everyone should be running this test?
• changes an existing test
• requires an update to a CATs integration-config

Did you update the README as appropriate for this change?

• YES
• N/A

If you are introducing a new acceptance test, what is your rationale for including it CATs rather than your own acceptance test suite?

CATs should validate common operator workflows.
CATs is not a regression test suite.
CATs is run by every component team to validate their releases before promotion.

How many more (or fewer) seconds of runtime will this change introduce to CATs?

0

What is the level of urgency for publishing this change?

• Urgent - unblocks current or future work
• Slightly Less than Urgent

Tag your pair, your PM, and/or team!

It's helpful to tag a few other folks on your team or your team alias in case we need to follow up later.

@nicolasbender @modulo11