Populate service chain config only if property is set
Populate service chain config only if property is set

This cleans up the output of ShowServiceChainReq by not displaying
routing instances that don't have any service chain configuration.

Change-Id: I9063dee37f6cd36ae3d13d86ec5eb8f25ced56af
Partial-Bug: 1445856

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