nova: use the correct notification driver

Nova now uses oslo.messaging and not the Oslo RPC code anymore,
therefore the new driver should be used instead.

Change-Id: I3533975ad38ff99bee6cfaa5332843444650f61f
Set uri_v3 in tempest config

This properly sets the v3 uri for keystone in the tempest config.
Previously tempest would just guess the v3 uri by replacing v2 with v3.
However, moving forward this will no longer be the case so devstack
should properly set this uri to enable tempest to use the keystone v3
api in addition to the v2.

Change-Id: Ib02b2e9f24d8ca1f381186c48747ca0fbc45f3f1
Fix misspellings in devstack

Fix misspellings detected by:
 * pip install misspellings
 * git ls-files | grep -v locale | misspellings -f -

Change-Id: I19726438d15cd27b813504aac530e7e53c4def12
Closes-Bug: #1257295
Merge "Set uri_v3 in tempest config"
Merge "nova: use the correct notification driver"
Merge "Fix misspellings in devstack"