Add new options: info_email.
Add new options: info_email.

  * info_email is used to provide an email address to be added
    as a footer in the email reports.

Change-Id: I05daff4691a351538df06bd3824d8dac31d5dfd2

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