CLOUDSTACK-2045:[Multiple IPs Per Nic] This feature is not working well in case of networks with external devices after GC
CLOUDSTACK-2045:[Multiple IPs Per Nic] This feature is not working well
in case of networks with external devices after GC

adding missing 'retrun false' for isNetworkReadyForGc for the networks
that use external network devices and has secondary IP's associated with
nics.

wido/cloudstack,resmo/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,GabrielBrascher/cloudstack,resmo/cloudstack,resmo/cloudstack,jcshen007/cloudstack,jcshen007/cloudstack,wido/cloudstack,resmo/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,wido/cloudstack,wido/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,jcshen007/cloudstack,resmo/cloudstack,jcshen007/cloudstack,wido/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,jcshen007/cloudstack,DaanHoogland/cloudstack,GabrielBrascher/cloudstack,jcshen007/cloudstack,resmo/cloudstack,wido/cloudstack,GabrielBrascher/cloudstack,DaanHoogland/cloudstack,DaanHoogland/cloudstack,DaanHoogland/cloudstack,resmo/cloudstack