Return 1 if binary requirements are not met

[aafeijoo-suse]

This PR fixes the requirements for the caps and plymouth modules.

The dasd_mod module has the same error, but it's RH specific and apparently the binary requirements could be dropped.

Checklist

• [ ] I have tested it locally
• [ ] I have reviewed and updated any documentation if relevant
• [ ] I am providing new code and test(s) for it