Install lxml dependency

Running tempest smoke tests fail on all the XML tests due to lxml not
being installed in keystone containers.  The lxml package is no longer
a hard dependency since lxml is only required when using the (optional)
XmlBodyMiddleware middleware.

Ideally we'd want to remove XmlBodyMiddleware middleware since it's
being removed in Kilo, however I have not seen an option to disable all
the XML tests in tempest.
Added repo_package variable file to nova-spice-console

This commit adds the missing repo_pacakges/nova_spice_console.yml file
to the nova-spice-console.yml play.
Updated neutron client sha

This PR changes the sha of the neutron client. This change is needed so that
we are not attempting to install a neutron client for juno which is known to
be broken.

Closes Issues https://github.com/rcbops/ansible-lxc-rpc/issues/350
Add retries for cinder get test

This fails as the volume service takes >10 seconds to start.
Adding retries is better than increasing the delay as it prevents
unnecesary waiting.

Closes #353
Increase retries for keystone_add_service

This is the first role to run after apache/keystone are restarted
so we need to wait for them both to come up, by having a large number
of retries on the first task.

Related to: #353
Remove serverspec playbooks and roles

These serverspec tests are largely unused and are not getting updated
as we update our ansible playbooks/roles.
Merge pull request #357 from mattt416/drop_serverspec

Remove serverspec playbooks and roles
Merge pull request #354 from hughsaunders/increase_cinder_get_timeout

Add retries for cinder get test
Merge pull request #356 from hughsaunders/increase_keystone_ensure_service_timeout

Increase keystone ensure service timeout
Merge pull request #336 from mattt416/add_lxml_dependency

Install lxml dependency
Merge pull request #348 from cloudnull/spice-update

Added repo_package variable file to nova-spice-console (master)
Merge pull request #351 from cloudnull/neutron-client-update

Updated neutron client sha (master)