[VirtualBox/el7] (4 commits) ...Drop VirtualBox-OSE-4.1.12-gsoap.patch, was for Fedora 15

Summary of changes: 738bad0... Use systemd-detect-virt to detect if we can install (*) 4728a69... Revert "Use systemd-detect-virt to detect if we can install (*) cafa488... Update VBox to 5.1.14 (*) f84c104... Drop VirtualBox-OSE-4.1.12-gsoap.patch, was for Fedora 15 (*) (*) This commit already existed in another branch; no separate mail sent