Add exception handler GlibGerror to virt-sandbox-service
Add exception handler GlibGerror to virt-sandbox-service

GlibGerror can be raised by virt-sandbox-service, this patch will catch
the exception and write the error to stderr.

Signed-off-by: Dan Walsh <7800de746fd39599bc46177380ea6aede7e31e16@redhat.com>

kraman/libvirt-sandbox,gczarcinski/libvirt-sandbox,agx/libvirt-sandbox-debian,agx/libvirt-sandbox-debian,gczarcinski/libvirt-sandbox,agx/libvirt-sandbox-debian,kraman/libvirt-sandbox,erenyagdiran/libvirt-sandbox,gczarcinski/libvirt-sandbox,kraman/libvirt-sandbox,libvirt/libvirt-sandbox,kraman/libvirt-sandbox,libvirt/libvirt-sandbox,gczarcinski/libvirt-sandbox,libvirt/libvirt-sandbox,agx/libvirt-sandbox-debian,agx/libvirt-sandbox-debian,erenyagdiran/libvirt-sandbox,gczarcinski/libvirt-sandbox,erenyagdiran/libvirt-sandbox,kraman/libvirt-sandbox,erenyagdiran/libvirt-sandbox,gczarcinski/libvirt-sandbox,kraman/libvirt-sandbox