HUE-1214 [sqoop] Sqoop App

- Sqoop version 2 compliant app
- The sqoop client manages framework and connector forms
- Front end models for connector, connection, job, and submissions
- create, delete, start, stop, clone, edit jobs
- create, delete, edit connections
- previous submissions page
HUE-1214 [sqoop] Improve error handling and alignment
HUE-1214 Polished job list page and removed data tables
HUE-1214 Automatic update of job submission history