xenapi: add username to vncviewer command

Devstack prints out an instruction, how to look at the virtual machine's
console. The command did not include the username, so if the user had a
config file to use a different username for that network, the command
failed.

Change-Id: I5dd49169c45e26e8d2bb3d5920a1b7fa584be50f
xenapi: Set VM memory before starting it

If someone was re-using an existing template, for a memory change, he
needed to re-install the vm. This change sets the osdomu mem before
starting it, so it doesn't matter how much memory did the VM had
according to the template. It also removes the memory manipulation bits
from install-os-vpx.sh.

Change-Id: Iad85f573b90c23140012c20c552a17277d9c97a0
xenapi: README.md and embedded localrc updates

This change updates the readme, so that it is easier to get started, and
reflects the actual behavior of DevStack.

Changes in README.md:
 - Link to xenserver download page
 - Remove neutron interface - it is no longer installed by devstack
 - Add appendix with
   - How to use a different ubuntu mirror
   - How to use a proxy for ubuntu
   - How to re-use the created VM
 - Remove run from snapshot section and "do cloudy stuff"

Changes in the Readme-embedded sample localrc:
 - Upload a vhd image and a uec image by default - easier to get started

Change-Id: I13bb8e59ff5367ff7623fe9aa273886a957f81a7
Cinder needs iscsiadm available

This patch adds the binary packages that contains
the iscsiadm utility for cinder.   Cinder
uses the iscsiadm utility for various actions
and it should be there for devstack users.

Fixes bug #1219032

Change-Id: I8e1c6e2e5d4bfade50aba9259b6da3957d6d622d
Add my_ip option in cinder.conf

Then cinder installed in multinode environment with more than one interface,
it's better to use CINDER_SERVICE_HOST option for cinder ip address.

Change-Id: I775b70407379d9c97696f536f5f89cecb33657be
Merge "xenapi: add username to vncviewer command"
Merge "Cinder needs iscsiadm available"
Merge "xenapi: Set VM memory before starting it"
Merge "xenapi: README.md and embedded localrc updates"
Merge "Add my_ip option in cinder.conf"
Merge branch 'master' of github.com:openstack-dev/devstack