Fix API URLs - boot tests.
Fix API URLs - boot tests.

  * Fix API URLs for boot handler tests.

Change-Id: Idf20edc2d3780f860317b457ba99ee7d00c65016

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