Improves shell script quoting, and adds

set -u
set -o pipefail

The following top level scripts are added under dev/:

* overcloud-deploy.sh
* seed-deploy.sh
* seed-hypervisor-deploy.sh

Some amount of configuration is possible via dev/config.sh.

Fix undefined variable in cadvisor role

When running latest kayobe on alaska, needed to ensure the correct
monitoring configuration was applied, I hit undefined variables,
hitting errors such as:

  The task includes an option with an undefined variable.
  The error was: 'nodeexporter_restart_policy' is undefined

On inspecting the role, it seems some cut and paste errors from the
nodeexporter role have snook in. The command is not required for the
docker_container directive, its not specified in the defaults.

Interestingly this triggered when I was just trying to redeploy haproxy.

roles/cadvisor: Added.

Support configuring Grafana

This add supports for running the stackhpc.grafana-conf Ansible
Galaxy role against a monitoring server to configure Grafana
post deployment. This includes:

* Creating an organisation
* Configuring dashboards for the organisation from a git repo
* Configuring datasources for the organisation

Support configuring API interface via overcloud inventory file

This is to support different hosts, having API interfaces with
different names.

Fix provisioning issues

This ensures that the seed VM honours any MTU configuration following its
initial provisioning.

Previously only a single DNS server was configured.

Previously we were relying on kolla-ansible's baremetal role to install pip, but if
virtualenvs are used for the target hosts with kolla-ansible (but not kayobe), then
pip will not be installed to the system site packages. This change installs pip
using easy_install if target virtualenvs are not in use for kayobe.

The CentOS cloud images from 7.2 (1511) onwards have a bogus name server
entry in /etc/resolv.conf, 10.0.2.3. Cloud-init only appends name server
entries to this file, and will not remove this bogus entry. Typically this
leads to a delay of around 30 seconds when connecting via SSH, due to a
timeout in NSS. The workaround employed here is to remove this bogus entry
from the image using virt-customize, if it exists. See
https://bugs.centos.org/view.php?id=14369.

Fixes: #112

Support monitoring hosts by default in overcloud inventory

Seed hypervisor bootstrap support

This allows kayobe to configure the kayobe ansible user (default stack) on the
seed-hypervisor using a bootstrap user account.

Add support for configuring Grafana

As per the Kolla project, this is disabled by default.

Add extra conf for cinder and ceph

Fix copy image ipa on seed

Fix storage config for docker-ce