[frontend] fix Modulemd deprecation warnings
DeprecationWarning: Modulemd.Profile.get_rpms is deprecated
DeprecationWarning: Modulemd.Component.get_name is deprecated
DeprecationWarning: Modulemd.Component.get_rationale is deprecated
DeprecationWarning: Modulemd.ComponentRpm.get_repository is deprecated
DeprecationWarning: Modulemd.ComponentRpm.get_ref is deprecated