* updates paramiko_ssh to auto add keys
* updates constants with new config options
This commit adds a new feature that will allow paramiko to automatically
accept and save a host ssh key. This feature is controlled by the
`host_key_auto_add` config setting in the paramiko section. The default
is False to maintain current functionality. It also includes a new
setting `look_for_keys` with the default to False for maintaining current the
current setting.
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