Fix keystone auth parameter to neutron conf

Devstack set auth_uri to  metadata_agent.ini.
But auth_uri is wrong parameter for metadate_agent.

This is regression caused by https://review.openstack.org/#/c/94545/

Change-Id: I3dcf1d619b5d204937f072b3fbb9966069793680
Closes-bug: #1364684
Fix the warning message of CINDER_MULTI_LVM_BACKEND

CINDER_MULTI_LVM_BACKEND is marked as deprecated and we recommend
to use CINDER_ENABLED_BACKENDS instead now. However current warning
message shows that CINDER_ENABLED_BACKENDS will be removed.
This patch fixes the message.

Change-Id: I3ca25e4273c3abebce1cfefe1ae4af622b71e993
Clean up local variable usage - Neutron

Change-Id: I3e19efd46cadcf0b4129a0f923fa7881f702d65c
ofagent: Switch to IptablesFirewallDriver

The latest version of ofagent
(ie. after blueprint ofagent-port-monitor)
follows IptablesFirewallDriver naming scheme.

Closes-Bug: #1364731
Related: blueprint ofagent-port-monitor
Change-Id: I690aab71b1cb222ffb8b458c90740ba623b0b37e
Fix preparation of aki/ari/ami images on Ubuntu

The boto tests currently don't run because euca-bundle-image fails on
Ubuntu; e.g.

---
 ++ euca-bundle-image -r x86_64 \
  -i /opt/stack/new/devstack/files/images/cirros-0.3.2-x86_64-uec/cirros-0.3.2-x86_64-vmlinuz \
  --kernel true \
  -d /opt/stack/new/devstack/files/images/s3-materials/cirros-0.3.2

 euca-bundle-image: error: No such file or directory: /opt/stack/new/devstack/files/images/s3-materials/cirros-0.3.2
---

I noticed this in debugging why Fedora tests are running slower.  I
think that the version of euca-bundle-image in Fedora must create the
directory if it doesn't exist, while the Ubuntu one fails.

I also think this doesn't get caught by errexit because it's running
in a special sub-shell to use other credentials.

Change-Id: I79125e956088353aa76a3f7d6d81af1e4f6a27d4
Merge "Clean up local variable usage - Neutron"
Merge "ofagent: Switch to IptablesFirewallDriver"
Merge "Fix the warning message of CINDER_MULTI_LVM_BACKEND"
Merge "Fix keystone auth parameter to neutron conf"