Add a Tunnel end-point variable for Neutron configuration

The HOST_IP address is being used as IP address
for end-point tunnel configruation. A new variable is
needed to specify a different IP address for the tunnel
end-point that Neutron will use

Change-Id: Ic7fb4853df167e78bf882af6a712b903db754dc2
Closes-bug: #1340433
Fix Neutron configuration if Ceilometer is enabled

Previously if Ceilometer service was enabled,
configuration option to enable Neutron network
notifications was not set. This fixes it.

Change-Id: Ia53d9db1828ef2daa0ce637b2a2635795856502c
Closes-Bug: #1340754
XenAPI: Use GUEST_PASSWORD when installing DomU

We know what the GUEST_PASSWORD will be, so set it during DomU
installation; therefore if the installation fails for any reason
we have a correct GUEST_PASSWORD set rather than the obscure and
undocumented 'r00tme'

Change-Id: I684646a74f2cede43667a40556e247955e042ae4
add python-mock to testonly package list

Python-mock is needed by most of OpenStack for testability. Add
this is a testonly package. This should fix current issues with
functional tests in OpenStack that use devstack, but not tox to
run their tests.

Closes-Bug: #1341507

Change-Id: I26cbe42ace75554bae993a6d849c3b4ac649c78e
Support multiple Cinder backend types

This is the first step in supporting multiple Cinder backend types at
once.  It initially converts the existing hard-coded multi-lvm support
to a new cinder_backends driver form.  Eventually the cinder_plugins
will be converted to this form so they can be enabled more than just
one at a time using CINDER_ENABLED_BACKENDS.

The default configuration should be identical to the previous defaults,
including for both True and False values of CINDER_MULTI_LVM_BACKEND.

The existing cinder_plugins are expected to be removed when this is
complete. They should continue to work until they have been converted.

Add wait for c-api to ensure it is started before continuing.

Change-Id: I93b8ef32832269d730c76a6dc24ddb4f20c6d9df
XenAPI: Fix race condition on tailing stack.log

Stack.log is created by stack.sh, which is started by run.sh.  Using
the pid from run.sh doesn't mean that stack.log has been created yet
so wait for the log to be created before tailing

Change-Id: I86e563478949cb7bbe0d1afd80b790ba70328e3a
Merge "Add a Tunnel end-point variable for Neutron configuration"
Merge "Support multiple Cinder backend types"
Merge "Fix Neutron configuration if Ceilometer is enabled"
Merge commit 'refs/changes/83/86083/2' of git://gold.eng.hq.xensource.com/git/github/openstack-dev/devstack into tmpbranch
Merge commit 'refs/changes/74/106774/2' of git://gold.eng.hq.xensource.com/git/github/openstack-dev/devstack into tmpbranch
Merge commit 'refs/changes/75/106775/1' of git://gold.eng.hq.xensource.com/git/github/openstack-dev/devstack into tmpbranch