Fix issue with user data for inlets-pro

Changelog for 0.3.7:

The name changed from having a suffix for linux, to having no
suffix at all. Also the version is bumped to 0.4.3. The issue
was found whilst trying to setup inlets-pro with inletsctl. The
operator may also need a patch for this change.

Tested by running the command as root on a Linux PC, before it
failed, after it worked.

Generated by Derek