Remove sysvinit from distro features and add Systemd as the default
init system. Add necessary service files to all recipes that need them.

Change-Id: I9cd4c0239fe16f35145bd3bed08e27196f30ee82
Reviewed-by: Gatis Paeglis <gatis.paeglis@theqtcompany.com>
Reviewed-by: Teemu Holappa <teemu.holappa@theqtcompany.com>