still getting 400 errors whne submitting packages

[Jeff Lane ]

Trying to submit results from Bionic on a z13 LPAR. I'm running all the current packages from the dev PPA on a bionic install.

ubuntu@s1lp10-jefflane:~$ apt-cache policy checkbox-ng
checkbox-ng:
  Installed: 1.1.0+git201804101036+pkg89~ubuntu18.04.1
  Candidate: 1.1.0+git201804101036+pkg89~ubuntu18.04.1
  Version table:
 *** 1.1.0+git201804101036+pkg89~ubuntu18.04.1 500
        500 http://ppa.launchpad.net/checkbox-dev/ppa/ubuntu bionic/main s390x Packages
        100 /var/lib/dpkg/status
     0.23-2 500
        500 http://us.ports.ubuntu.com/ubuntu-ports bionic/main s390x Packages

Do you want to submit 'upload to certification' report?
  y => yes
  n => no
[yn]: y
Enter secure-id:a00D000000feNuTIAU
WARNING:checkbox-ng.launcher.stages:Problem occured when submitting upload to certification report: 400 Client Error: BAD REQUEST for url: https://certification.canonical.com/api/v1/submission/a00D000000feNuTIAU/
Do you want to retry?
  y => yes
  n => no
[yn]: y
Enter secure-id:a00D000000feNuTIAU
WARNING:checkbox-ng.launcher.stages:Problem occured when submitting upload to certification report: 400 Client Error: BAD REQUEST for url: https://certification.canonical.com/api/v1/submission/a00D000000feNuTIAU/

There appears to still be bad json in the results:
ubuntu@s1lp10-jefflane:~/result$ python3 -mjson.tool submission.json
Expecting value: line 3686 column 24 (char 116843)

the offending line is:

 "raw-devices-dmi": ,

Once modified to "raw-devices-dmi": "",

the json check is successful and once I rebuild the tarball and submit it, the submission is successful:

ubuntu@s1lp10-jefflane:~/result$ canonical-certification-submit a00D000000feNuTIAU submission_2018-04-12T15.06.57.515381-fixed.tar.xz
Successfully sent, submission status at https://certification.canonical.com/submissions/status/12c6f6b0-307b-4422-abef-fed77345b0cd

[Jeff Lane  (bladernr)]

ubuntu@s1lp10-jefflane:~$ dpkg -l |grep checkbox
ii checkbox-ng 1.1.0+git201804101036+pkg89~ubuntu18.04.1 all CheckBoxNG test runner
ii plainbox-provider-checkbox 0.43.0+git201804111340+pkg79~ubuntu18.04.1 s390x CheckBox provider for PlainBox
ii python3-checkbox-ng 1.1.0+git201804101036+pkg89~ubuntu18.04.1 all CheckBoxNG test runner (Python 3 library)
ii python3-checkbox-support 0.37.0+git201803191445+pkg75~ubuntu18.04.1 all collection of Python modules used by PlainBox providers