Fix schema crash when deleting RT
Fix schema crash when deleting RT

Change-Id: Ib277781c2b6862fceb9590f05f4021d6c6f83140
Closes-Bug: #1462921

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