I have installed with centos6.7 with Java 1.8.0_60, virtualbox5.0-5.0.16, maven 3.3.9, ansible 220.127.116.11, vagrant 1.8.1, python 2.7 and metro 0.2.0beta.
Share the output of ./platform-info.sh.
Got that error too a month ago. Didn't find a clear way to get rid of it on the internet.
The fact is i add downloaded Virtual Box rpm from the web and manually installed it.
Suppressed Virtual Box and reinstalled with yum and all was working OK.