Upgrade nova to juno

Required a glance and neutron section for associated configs.
Required a keystone_authtoken for renamed settings.
Removed image_service, has been gone since 2012
Update api-paste to match upstream
  v3 and v21 paths.
  request ID logging
  Updated keystone authtoken argument for identity_uri
  (http://www.jamielennox.net/blog/2014/05/21/identity-uri-in-auth-token-middleware/)
Neutron juno upgrade

Updated keystone options.

update api-paste from upstream
  Also use keystone middleware identity_uri

refresh policy from upstream

Update nova notification details with the right tenant
Upgrade percona to 5.6

A neutron migration will crash 5.5
sst method upgraded to v2. Previous version does not work.