Remove obsolete redhat-eventlet.patch

See I62ce43a330d7ae94eda4c7498782a655e63747fa for the gorey details on
why this exists.

As of this fix:

  https://github.com/eventlet/eventlet/pull/34

which was released in eventlet 0.13, we no longer need the patch.

This has now been removed from oslo-incubator, so this is really just
syncing that removal.

Change-Id: I84267f3c6726cb2e750f615e107c48b12c6ed353
Updating address pairs with xml doesn't work

Below command can't work because list element
"allowed_address_pairs" hasn't been updated
into the varaiable "attr.PLURALS"
"neutron port-update <port-uuid> \
--allowed-address-pairs list=true type=dict \
ip_address=10.0.0.1 --request-format xml"

Change-Id: I0d7dcca5f4848bc968f5c86fbeb46569c70c8fcd
Closes-Bug: #1229954
Merge "Remove obsolete redhat-eventlet.patch"