Install SSH key without managing home directory/manage home directory permissions

[danb223]

I'm using this module for various things including a SFTP setup, in the process of doing so we need the home directories to be created and owned by root, in which case since this doesn't seem possible we have set the manage_home to false however then ssh keys stopped getting managed to.

So either need the option for manage_home to have no affect on managing the ssh keys or need an option to set the user and group for the users home directory instead of setting to the user by default.