[CentOS-virt] Xen 4.7rc4 packages available for testing

[George Dunlap]

As per our policy, the next officially supported Virt SIG Xen version
will be 4.8.  However, with 4.7 coming soon, I've ported the
patchqueue over to 4.7rc4 and given it a spin.  If you want to help
testing for the upstream 4.7 release, do give it a spin and report any
regressions.

Please note that this version WILL NOT SUPPORTED.  4.6 is still the
officially-supported version until 4.8 comes out (probably in around 6
month's time).

Thanks,
 -George