lxc: fix setmem effect on a running LXC machine
lxc: fix setmem effect on a running LXC machine

When user calls setmem on a running LXC machine, we do update its cgroup
entry, however we neither update domain's runtime XML nor
we update our internal structures and this patch fixes it.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1131919

rlaager/libvirt,elmarco/libvirt,jardasgit/libvirt,eskultety/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,eskultety/libvirt,andreabolognani/libvirt,rlaager/libvirt,rlaager/libvirt,nertpinx/libvirt,zippy2/libvirt,taget/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,datto/libvirt,nertpinx/libvirt,nertpinx/libvirt,datto/libvirt,libvirt/libvirt,eskultety/libvirt,datto/libvirt,agx/libvirt,agx/libvirt,jardasgit/libvirt,jardasgit/libvirt,shugaoye/libvirt,andreabolognani/libvirt,crobinso/libvirt,rlaager/libvirt,olafhering/libvirt,datto/libvirt,shugaoye/libvirt,eskultety/libvirt,olafhering/libvirt,andreabolognani/libvirt,eskultety/libvirt,crobinso/libvirt,andreabolognani/libvirt,crobinso/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,agx/libvirt,elmarco/libvirt,shugaoye/libvirt,jfehlig/libvirt,taget/libvirt,libvirt/libvirt,VenkatDatta/libvirt,libvirt/libvirt,jfehlig/libvirt,elmarco/libvirt,datto/libvirt,shugaoye/libvirt,zippy2/libvirt,rlaager/libvirt,crobinso/libvirt,fabianfreyer/libvirt,libvirt/libvirt,fabianfreyer/libvirt,elmarco/libvirt,zippy2/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,taget/libvirt,agx/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,olafhering/libvirt,VenkatDatta/libvirt,elmarco/libvirt,agx/libvirt,taget/libvirt,olafhering/libvirt,zippy2/libvirt,andreabolognani/libvirt,jfehlig/libvirt,jardasgit/libvirt,taget/libvirt