Description of problem:
Currently nbdb/sbdb election-timer value is set to 5 second (from default 1 second) during the pod startup. After pods are in running state, and user manually changes the value of election-timer it's stored in the db. But when the pod restarts, it actually override the election-timer to default 5 second again, ideally it should not reset the value if the election-timer value is manually overridden.

Version-Release number of selected component (if applicable):


How reproducible:

Very easy to reproduce.


Steps to Reproduce:
*.* Deploy ovn-kubernetes 
*.* Change the nbdb/sbdb election-timer to some value except default value of 5 second (e.g 10 seconds)
*.* Restart the nbdb/sbdb pod. It will reset the value from 10 second to 5 second. Following log message will be logged in the nb/sb db log file

```2020-07-10T14:58:29Z|00025|raft|INFO|Election timer changed from 16000 to 5000```

Actual results:
Restart resets the election-timer value to default value.

Expected results:
It should restart the pods with the non-default value (if configured)

Additional info: