This reverts commit 2e1a91c50b
It looks like this introduced race bug 1491949 in the
gate-tempest-dsvm-large-ops job causing rpc timeouts when
deallocating network information for an instance,
specifically around the dnsmasq callback to release the
fixed IP that the instance was using which triggers the
disassociation between the fixed IP and the instance in the
nova database.
Change-Id: I163cdeea75e92485f241647c69aea0d7456c3258
Closes-Bug: #1491949
9752431892