Optimize validation of logical interface create
Optimize validation of logical interface create

1. Read logical interfaces in a bulk read.
2. use dbe_list instead of dbe_read

Change-Id: I5449fdf67449f490b5a949c3fef5ab82bff8256d
Closes-bug: #1443119

eonpatapon/contrail-controller,vmahuli/contrail-controller,DreamLab/contrail-controller,tcpcloud/contrail-controller,numansiddique/contrail-controller,codilime/contrail-controller,hthompson6/contrail-controller,numansiddique/contrail-controller,eonpatapon/contrail-controller,hthompson6/contrail-controller,sajuptpm/contrail-controller,sajuptpm/contrail-controller,nischalsheth/contrail-controller,sajuptpm/contrail-controller,tcpcloud/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,facetothefate/contrail-controller,rombie/contrail-controller,sajuptpm/contrail-controller,vmahuli/contrail-controller,reiaaoyama/contrail-controller,vpramo/contrail-controller,eonpatapon/contrail-controller,vmahuli/contrail-controller,vmahuli/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,tcpcloud/contrail-controller,eonpatapon/contrail-controller,tcpcloud/contrail-controller,nischalsheth/contrail-controller,hthompson6/contrail-controller,facetothefate/contrail-controller,sajuptpm/contrail-controller,reiaaoyama/contrail-controller,vpramo/contrail-controller,reiaaoyama/contrail-controller,rombie/contrail-controller,DreamLab/contrail-controller,nischalsheth/contrail-controller,vpramo/contrail-controller,rombie/contrail-controller,sajuptpm/contrail-controller,facetothefate/contrail-controller,vpramo/contrail-controller,vmahuli/contrail-controller,DreamLab/contrail-controller,rombie/contrail-controller,hthompson6/contrail-controller,rombie/contrail-controller,codilime/contrail-controller,numansiddique/contrail-controller,tcpcloud/contrail-controller,codilime/contrail-controller,numansiddique/contrail-controller,codilime/contrail-controller,facetothefate/contrail-controller,hthompson6/contrail-controller,facetothefate/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,numansiddique/contrail-controller,reiaaoyama/contrail-controller,tcpcloud/contrail-controller,vpramo/contrail-controller,codilime/contrail-controller,codilime/contrail-controller,rombie/contrail-controller,DreamLab/contrail-controller,DreamLab/contrail-controller,reiaaoyama/contrail-controller,nischalsheth/contrail-controller