Fixes authentication for cinder

This patch adds additional keystone auth configuration that allows
the cinder client to access the cinder-api.  Previous to this patch
the error log displayed the following message when the cinder client
attempted to run any command.

"keystoneclient.middleware.auth_token [-] Authorization failed"

Change-Id: Ica0863fff794b994938ecd494f5e5f6caf070143
Fixes heat-cfntools install

When using heat-cfntools with diskimage-builder, the pip install
of heat-cfntools package is skipped because it's already in the
system site-packages directory.  Unfortunately it doesn't copy
the scripts from the heat-cfntools bin directory into the venv
bin directory and the diskimage-builder command will fail.

This patch adds gcc to the install-packages line and removes
the --system-site-packages flag from the virtualenv creation.
This ensures the heat-cfntools package is properly installed.

Change-Id: I29d8f310a47ea2b5d4148cf3fa32485dea3424e8
Fixes tgtd restart in cinder element

In a previous patch, the restart of tgtd was erroneously removed
and causes the cinder-volume service to create a symlink to a
volume but return an error to the cinder-scheduler.  This "volume"
must then be manually removed and tgtd service restarted before
cinder-volume works properly.

This patch adds the restart of tgtd again and allows cinder to
work as advertised without additional intervention.

Change-Id: I1c2cb22773ab8b39e4bbe028474665df81ac08a1
Install openstack-neutron-ml2

openstack-neutron-ml2 is the package we should actually be installing
here.  openstack-neutron-ml2 requires openstack-neutron, so technically
we don't need to list openstack-neutron at all, but I left it in as it's
more visually expicity of what's happening.

Change-Id: Ia1b81cfa658b352ec7799fd67dfa1dd9d14463cd
Merge "Install openstack-neutron-ml2"
Merge "Fixes authentication for cinder"
Merge "Fixes heat-cfntools install"
Merge "Fixes tgtd restart in cinder element"
Stop adding qpid to heat requirements.

Now heat has it itself, it makes pip blow up.

Change-Id: Id234c44d09742d81ba15793ca3c9041efb09b377