Account for the ctl test needing the ctl(4) module

[ngie]

Summary

This testcase does not function unless the /dev/ctl/... node exists,
which is created by the ctl(4) module. Require the ctl(4) module to be
loaded so the test can be executed.

MFC after: 1 week

Test Plan

• The tests are skipped if either the ctl module or the fusefs modules are not loaded.
• The tests passed when both of the modules were loaded.