Secondary Users: Access to modules that require a user account

[fgiannar]

Steps to reproduce the issue

1. Create a fully connected Jetpack site
2. Add a new admin user
3. Log in with your new admin user and go to Jetpack->Settings
4. Modules that require the current user to be connected, like "Downtime Monitoring" will be enabled.

What I expected

Modules that require the current user to be connected, like "Downtime Monitoring" should be disabled

What happened instead

"Downtime Monitoring" is enabled. The link to "Configure your notification settings" will not work.

Screenshots
After clicking the "Configure your notification settings" with a non-connected secondary user: