Establishing leadership should be very fast and never make external API
calls.
This fixes a situation where there is a long backlog of Vault tokens to
be revoked on when leadership is gained. In such case, revoking the
tokens will significantly slow down leadership establishment and slow
down processing. Worse, the revocation call does not honor leadership
`stopCh` signals, so it will not stop when the leader loses leadership.
Token revocation
Remove from the statestore
Revoke tokens
Don't error when Vault is disabled as this could cause issue if the operator ever goes from enabled to disabled
update server interface to allow enable/disable and config loading
test the new functions
Leader revoke
Use active
Mahmood Ali