Use correct return value of dbe_read
Use correct return value of dbe_read

dbe_read does not return http error code. It just returns a boolean ok/fail and result.
We were trying to unpack it into error code and message. Instead, use 404 error code and read_result as message to return proper error to the caller.

Change-Id: I2ed97cbad6b2def7df8de01bb8bfa23979cc5282
Closes-Bug: 1392643

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