Add support for setting up <channel> elements in libvirt config

To enable use of guest agents, support for configuring the
<channel> elements in libvirt XML config is required

Blueprint: libvirt-spice
Change-Id: I3cea7b326bb2f746c5804d0aa3bbe369da6935e8
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Updates prerequisite packages for fedora

Adds gcc, libxslt-devel (has dependency on libxml2-devel) and mysql-devel to
the list of prerequisites

Change-Id: I9c27868b30ef17d73adf8ad2e72b3d0e76fe76d1
Merge "Add support for setting up <channel> elements in libvirt config"
Merge "Updates prerequisite packages for fedora"