Adding Fabian.
You can use the released appliance but you'll need to manually update it.We have a nightly built appliance available in jenkins, waiting fabian for releasing it with RC4 rpms included.You can find an updated appliance here: http://jenkins.ovirt.org/job/ovirt-appliance_ovirt-3.6_build-artifacts-el7-x86_64/lastSuccessfulBuild/artifact/exported-artifacts/ovirt-engine-appliance-3.6-20151211.1.el7.centos.noarch.rpm