LG-562 Add a new redirect_uri for logout with the CBP ROAM SP

[stevegsa]

Why: Per request from the agency due to new logout uri restrictions.

How: Update service_providers.yml

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of our code quality guidelines. The rest of the list can be found in
CONTRIBUTING.md

Controllers

• When adding a new controller that requires the user to be fully
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Database

• Unsafe migrations are implemented over several PRs and over several
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• Indexes were added if necessary. This article provides a good overview
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• Verified that the changes don't affect other apps (such as the dashboard)

• When relevant, a rake task is created to populate the necessary DB columns
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• Migrations against existing tables have been tested against a copy of the
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  issues. In that case, all the migration did was add a new column and an index to
  the Users table, which might seem innocuous.

Encryption

• The changes are compatible with data that was encrypted with the old code.

Routes

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Session

• When adding user data to the session, use the user_session helper
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Testing

• Tests added for this feature/bug
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