Avoid error message when a optional proxy definitions are missing.

In Catalyst editions, we'd get error messages when optional proxy
definitions are missing. This fixes that issue by ensuring that the
proxy prototypes can be created.

Change-Id: I9ef0bbb7751a43e98331c5133414f465bf6a2bd8
Merge topic 'fix_catalyst_dashboards' into next

74e3a08f Avoid error message when a optional proxy definitions are missing.