list: Query containers by batch of 10
list: Query containers by batch of 10

This improves performance about as much as we can realistically do it,
less than 100ms per container when retrieving all network information,
cgroup and disk usage.

To get any faster, simply not requesting the information by using -c is
the way to go.

Closes #671

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

pcdummy/lxd,yura-pakhuchiy/lxd,Skarlso/lxd,Skarlso/lxd,atxwebs/lxd,lxc/lxd,mjeanson/lxd,jsavikko/lxd,yura-pakhuchiy/lxd,jsavikko/lxd,pcdummy/lxd,hallyn/lxd,Skarlso/lxd,stgraber/lxd,hallyn/lxd,chrisglass/lxd,chrisglass/lxd,hallyn/lxd,erikmack/lxd,akshaykarle/lxd,lxc/lxd,lxc/lxd,ollie314/lxd,ollie314/lxd,akshaykarle/lxd,techtonik/lxd,lxc/lxd,chrisglass/lxd,techtonik/lxd,yura-pakhuchiy/lxd,stgraber/lxd,jsavikko/lxd,pcdummy/lxd,lxc/lxd,stgraber/lxd,georghopp/lxd,atxwebs/lxd,mjeanson/lxd,techtonik/lxd,akshaykarle/lxd,ollie314/lxd,hallyn/lxd,atxwebs/lxd,Skarlso/lxd,erikmack/lxd,erikmack/lxd,atxwebs/lxd,lxc/lxd,georghopp/lxd,hallyn/lxd,mjeanson/lxd,stgraber/lxd,georghopp/lxd,stgraber/lxd,hallyn/lxd,stgraber/lxd,lxc/lxd,stgraber/lxd