Changes made for enabling Google analytics for each page as well as collect elapsedTime using event tracking feature for LHN expand tree, navigate to a object and tree view for mappings
Add Analytics and `GGRC.Tracker` setup

* Add tracking around TreeView, LHN flows, and DashboardWidget display
* Replace exception logging to `/api/log_event` with logging to GA
* Handle localhost use of Google Analytics
* Add `GOOGLE_ANALYTICS_ID` and `GOOGLE_ANALYTICS_DOMAIN` settings to
  settings.default
Add `GOOGLE_ANALYTICS_*` variables to deployment process
Merge pull request #1243 from reciprocity/feature/google-analytics-patch

Google Analytics patch