job: Fix job handler for new mongodb object ID.
job: Fix job handler for new mongodb object ID.

Change-Id: I008aa2eeec7d55fa63df257437875647f75935db

joyxu/kernelci-backend,joyxu/kernelci-backend,kernelci/kernelci-backend,joyxu/kernelci-backend,kernelci/kernelci-backend