xfce4-vala-4.10.3-9 requires vala_version 0.20 when RHEL7.2 provides vala-0.26.1-3 in server-optional repos. This trigger a problem when trying to build xfce-bluetooth because xfce4-vala is a BuildRequires.
xfce4-vala-4.10.3-10.el7 has been submitted as an update to Fedora EPEL 7. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2015-338937b0c9
xfce4-vala-4.10.3-10.el7 has been pushed to the Fedora EPEL 7 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with $ su -c 'yum --enablerepo=epel-testing update xfce4-vala' You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2015-338937b0c9
xfce4-vala-4.10.3-10.el7 has been pushed to the Fedora EPEL 7 stable repository. If problems still persist, please make note of it in this bug report.