tpaexec deprovision
===================

Deprovision destroys a cluster and associated resources.

For a cluster using the ``aws`` platform, it will remove the instances
and all keypairs, policies, volumes, security groups, route tables, VPC
subnets, internet gateways and VPCs which were set up for the cluster.

For a cluster using the ``docker`` platform, it will remove the
containers, any ccache directories which were set up for source builds
in the containers, and any docker networks which were set up for the
cluster.