Prevent overlapping RPMs from buildrequired base modules from being available when using default modules
    
    When using default modules, this feature will add conflicts to
    module-build-macros for every RPM in a buildrequired base module
    that overlaps with RPMs in the buildrequired modules. This will
    prevent them from being available in the buildroot, and thus
    ensure that the RPMs from the buildrequired modules (non-base
    modules) are used even if they have a lower NVR.