[BUG] [auto_compl]: other list keys are returned when list has more than one key

[Ali-aqrabawi]

when the list has one key, for example the iproute2-ip-route, if you choose the first key should return all keys in the datatree, but the next key should return the keys configured with first key.

pc(config-routes-iproute2)# route 1.1.1.0/24 0 
  0
  3
pc(config-routes-iproute2)# route 4.4.4.4/32 0   
  0
  3
pc(config-routes-iproute2)# show config-candidate routes-iproute2 
<routes xmlns="urn:okda:iproute2:ip:route">
  <route>
    <prefix>1.1.1.0/24</prefix>
    <table>0</table>
    <metric>0</metric>
    <tos>EF</tos>
    <nexthop>
      <dev>opal3</dev>
    </nexthop>
  </route>
  <route>
    <prefix>1.1.1.0/24</prefix>
    <table>0</table>
    <metric>3</metric>
    <tos>EF</tos>
    <flag>onlink</flag>
  </route>
</routes>