Enable Local auth only till system is ready

[saravanan-i]

What I did

Restore AAA authentication during reboot so that subsequence boot up will not allow system access to unsaved radius/tacacs config users till system gets ready

How I did it

Modified the common-auth-sonic fiile to have only local authentication during reboot

How to verify it

1. Configure valid RADIUS server
2. Configure AAA authentication login to radius alone
3. Reboot the system without saving the configuration
4. After reboot, (before system gets ready) observe that console only allows local user alone.

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)