removed dependency on python humanize module.
removed dependency on python humanize module.

The machine_audit callback plugin was importing the 'humanize' python module (not part of standard library).  Since this callback is invoked on all playbook runs, it's overkill to require anyone using a playbook to install this python module.  A simple refactor to add the relevant method directly to the plugin file.

AtlasOfLivingAustralia/ala-install,djtfmartin/ala-install,INBio/ala-install,sadeghim/ala-install,djtfmartin/ala-install,djtfmartin/ala-install,sadeghim/ala-install,AtlasOfLivingAustralia/ala-install,AtlasOfLivingAustralia/ala-install,AtlasOfLivingAustralia/ala-install,AtlasOfLivingAustralia/ala-install,sadeghim/ala-install,INBio/ala-install,sadeghim/ala-install,djtfmartin/ala-install,INBio/ala-install,INBio/ala-install