Add heat templates for 2_role scenario

This commit adds some heat templates that can be used
in conjunction with scenariobuilder to create stacks that
deploy puppet_openstack_builder in VMs on an openstack
cloud.

The template and bootstrap cannot be used on their own,
as user and global config is must be inserted into
the metadata fields of each node informing them of the
desired configuration.

Two sample config files are provided under contrib to
help users get started.

Change-Id: I1b9365a8d6e5afc96e720836aadc07df5595d965
Replace dpkg --purge call with apt-get

dpkg --purge leads you into a morass of dependencies and as is
written now does not function. Replace it with a simple
apt-get remove --purge --yes call.

Change-Id: I3c20371d0a63955aaca44957f8f988eb1da4141f
Use a public ntp server

Replace the private Cisco NTP server with the public pool

Change-Id: If58d65de08e10b4f1429fbe1acd707b9fdf5dce3
Merge "Add heat templates for 2_role scenario"
Merge "Use a public ntp server"
Merge "Replace dpkg --purge call with apt-get"
Merge branch 'master' of https://github.com/stackforge/puppet_openstack_builder into coi-development