Merge pull request #12753 from gtmanfred/develop

add cache_node_list to list_node_full
Remove redundant import
Merge pull request #12757 from terminalmage/fix-redundant-import

Remove redundant import
Set root password for nova vms

If the server is already created and just needs to be bootstrapped,
change the password using the api to something set by secure_password
change password if instance already exists Openstack
pylint fixes