Perform consolidation and cleanup post-merge of chef_wm

* remove chef_wm.app.src, chef_wm_sup, and chef_wm_app
* remove chef_wm dependency from rebar.config
* remove chef_wm_authz and tests, it is no longer used.
* replace all include_library  references to `chef_wm` with local incldue
* remove BASE_ROUTES macro
* remove BASE_RESOURCE macro
* combine oc_chef_wm and chef_wm, removing duplicated functions in
* favor of oc_chef_wm_base)
* consolidate and clean up oc_chef_wm_base/chef_wm_base mixins
* combine chef_wm.hrl into oc_chef_wm.hrl and update all references