Prior to this change, cnmallocator would call
`ConfigGlobalScopeDefaultNetworks` right before initializing its
IPAM drivers. This function was mutating some global state used
during drivers init.
This change just remove the global state, and adds an arg to
ipams.Register and defaultipam.Register to pass the global pools
by arguments instead.
Signed-off-by: Albin Kerouanton <albinker@gmail.com>
All drivers except the default have a Register function. Before this
change, default's registration was handled by another package. Move
this logic into the driver pkg.
Signed-off-by: Albin Kerouanton <albinker@gmail.com>
Packages in libnet/ipams are drivers, except builtin -- it's used
to register drivers. Move files one level up and delete this pkg.
Signed-off-by: Albin Kerouanton <albinker@gmail.com>
