Cleans up feature set for 3.3

This removes the experimental features that were not selected
for 3.3 release.

* Removes dpath requirement
* Removes generated action_plugins
* Removes network UI v1 api
* Removes unused network management commands
* Removes network UI CLI client
* Removes templates
* Removes unused DataBinding models
* Removes obsolete test
* Removes unused admin and tests
* Removes experimental UndoPersistence, RedoPersistence, and auto-layout functions
* Removes API endpoints for network visualization
* Removes unused consumer routes
* Removes group, site, and rack features for 3.3
* Removes unused tables controller
* Removes undo/redo
* Removes group code and scale checks

requirements/requirements.in

@@ -60,4 +60,3 @@ uwsgitop==0.10.0
 xmltodict==0.11.0
 pip==9.0.1
 setuptools==36.0.1
-dpath==1.4.0