[Devstack] fix waiting resources on subnode
[Devstack] fix waiting resources on subnode

For multinode setup we enroll IRONIC_VM_COUNT VMs on each of nodes.
As result on subnode we expecting to have 2 * IRONIC_VM_COUNT resources.

Change-Id: I5f939b0e4a8169e27c3b338ed2857efbe7263ecd

SauloAislan/ironic,openstack/ironic,pshchelo/ironic,openstack/ironic,NaohiroTamura/ironic,SauloAislan/ironic,pshchelo/ironic,NaohiroTamura/ironic