Revert "Wait for memory and vcpus from hypervisor stats"

This reverts commit e14e05e51351b4273023c57e3b9149063774ac56.
which is change-id I40ac243a5c9d97264accbefe4ce96497914b6b01

The TE_DATAFILE can contain undercloud nodes as well as overcloud
nodes, and so the wait_for would never complete in this situation.

Change-Id: I3f35a5cd5eed750d53fc758e4b16c1971cb3a809