Fix 259 alerts reported by the LGTM tool:
- 245 for Unused import
- 7 for Testing equality to None
- 5 for Duplicate key in dict literal
- 1 for Module is imported more than once
- 1 for Unused local variable
* Add new CIG device CS6436-54P and CS5435-54P, also update code for CS6436-56P
* security kernel update to 4.9.189 for CIG devices
* security kernel update to 4.9.189 for CIG devices
* Update rules
Update rule file