Install qemu-kvm instead of kvm package on Ubuntu

Since at least 12.04, the kvm package is a transitional dummy
package intended to move users to the newer qemu-kvm package.  This
removes the dependency on this dummy package, which will be going away
in 14.04, and instead depends on the proper qemu-kvm package.

Change-Id: I4a88ada3cf32106413a9fae6fe77c9c4c28a524e
Closes-bug: #1294557
diff --git a/files/apts/nova b/files/apts/nova
index ae925c3..60119ad 100644
--- a/files/apts/nova
+++ b/files/apts/nova
@@ -12,7 +12,7 @@
 ebtables
 sqlite3
 sudo
-kvm # NOPRIME
+qemu-kvm # NOPRIME
 qemu # dist:wheezy,jessie NOPRIME
 libvirt-bin # NOPRIME
 libjs-jquery-tablesorter # Needed for coverage html reports