get package back in sync with sle12 version

- use plymouth-theme-tribar also for openSUSE

- include IBM1047.so (bsc#951953)
- 14.204

- adjust sle product name to sle12-sp1 (bsc#951244)
- 14.203

- tell udevd not to set mount flags (bsc#937237)
- 14.202

- set the default repo location based of the products file (bsc#904755)
- 14.201

- drop console=ttyS0 from s390x cd boot options (bsc#944443)
- 14.200

- fix SUSEConnect integration (bsc#949934)
- 14.199

- Let the top-level README be only a pointer.
- Removed leftover file; see doc/README.md doc/files.md
- Try to display docs both on GitHub and ReadTheDocs
- 14.198
- added ExcludeArch i586 (bnc#924024)
- add grub2 to buildrequires for s390x (bnc#893971)
- handle xen & xen-kmp separately in spec file (bnc#906248)
- add polkit user to rescue system and create machine-id (bnc#922804)
- prepare for rpm signature checking in linuxrc (bnc#901598)
- create snapper image (fate#318392)