Description of problem:

2 issues:

1) [root@ip-10-0-167-66 ~]# hammer content-view create --name test2 --organization-id 3 --rolling Could not create the content view: undefined method `any?' for nil:NilClass

2) The UI allows you to make rolling CVs without any environment, which is pointless. No content will be distributed.

How reproducible:

100%

Is this issue a regression from an earlier version:

Yes

Steps to Reproduce:

hammer content-view create --name test2 --organization-id 3 --rolling

Actual behavior:
Ugly error is thrown when nil is passed for environment IDs

When [] is passed for environment IDs, the rolling CV has no environments, which is pointless

The UI also allows for the above, which needs fixing.

Expected behavior:
Library is assumed if no environments are passed in the API and the UI.

Business Impact / Additional info: