Currently, when there are some qemu processes which may be some useful
virtual machines running by the operator running on non compute node, the
cleanup script will fail the cleanup operation for that node. We need to
ignore the qemu process check for non compute nodes.

Change-Id: If49a1a30764063935b2a65312de8f3b2357c7fbc
Closes-bug: 1633005

The cleanup command in the external API is a misnomer and should
be called destroy.

Change-Id: I083e80699e09bb24266ce1bf549772a5de92a49e
Closes-Bug: 1610364

Change-Id: I5f422574d7e50ec9a1e5862b66ecbf39fe1594d2
Closes-Bug: #1531721
Implements: blueprint ansible-cleanup-role