obs-service-kiwi_metainfo_helper does not consider Dockerfile.FLAVOR in _multibuild projects dcassany moderate recommended

Recommended update for obs-service-kiwi_metainfo_helper

This update for obs-service-kiwi_metainfo_helper fixes the following issues: - Support Docker.FLAVOR in _multibuild (bsc#1226010) - Replace %ARCH% with the architecture in images for supporting subscriptions in SCC based on architectures - cpio on SLE12 does not support -D option, emulate it. obs-service-kiwi_metainfo_helper