Repo doesn't pass validation

[johnpaulashenfelter]

A lot of the modules are not valid.

modules/DEMO-branching-art.yml#0: INVALID
  - (line 1) [/] key 'learning-objective:' is required.
  - (line 3) [/learning-objective] value required but none.
  - (line 6) [/screens/0/lab] key 'presenter-script:' is required.
  - (line 6) [/screens/0/lab] key 'steps:' is required.
  - (line 8) [/screens/0/lab/presenter-script] value required but none.
modules/DEMO-branching-lab.yml#0: INVALID
  - (line 1) [/] key 'learning-objective:' is required.
  - (line 3) [/learning-objective] value required but none.
  - (line 6) [/screens/0/lab] key 'presenter-script:' is required.
  - (line 8) [/screens/0/lab/presenter-script] value required but none.
  - (line 41) [/screens/0/lab/steps/5] key 'id:' is required.
modules/DEMO-branching.yml#0: INVALID
  - (line 1) [/] key 'learning-objective:' is required.
  - (line 3) [/learning-objective] value required but none.
  - (line 6) [/screens/0/lab] key 'presenter-script:' is required.
  - (line 8) [/screens/0/lab/presenter-script] value required but none.
  - (line 76) [/screens/0/lab/steps/5] key 'id:' is required.
modules/DEMO-intro-to-gh.yml#0: valid.
modules/DEMO-issues.yml#0: valid.
modules/DEMO-outro-art.yml#0: INVALID
  - (line 1) [/] key 'learning-objective:' is required.
  - (line 3) [/learning-objective] value required but none.
  - (line 6) [/screens/0/lab] key 'presenter-script:' is required.
  - (line 6) [/screens/0/lab] key 'steps:' is required.
  - (line 8) [/screens/0/lab/presenter-script] value required but none.
modules/DEMO-outro-lab.yml#0: INVALID
  - (line 1) [/] key 'learning-objective:' is required.
  - (line 3) [/learning-objective] value required but none.
  - (line 6) [/screens/0/lab] key 'presenter-script:' is required.
  - (line 8) [/screens/0/lab/presenter-script] value required but none.
modules/DEMO-outro.yml#0: INVALID
  - (line 1) [/] key 'learning-objective:' is required.
  - (line 3) [/learning-objective] value required but none.
  - (line 6) [/screens/0/lab] key 'presenter-script:' is required.
  - (line 8) [/screens/0/lab/presenter-script] value required but none.
modules/DEMO-pull-requests-art.yml#0: INVALID
  - (line 1) [/] key 'learning-objective:' is required.
  - (line 3) [/learning-objective] value required but none.
  - (line 6) [/screens/0/lab] key 'presenter-script:' is required.
  - (line 6) [/screens/0/lab] key 'steps:' is required.
  - (line 8) [/screens/0/lab/presenter-script] value required but none.
modules/DEMO-pull-requests-lab.yml#0: INVALID
  - (line 1) [/] key 'learning-objective:' is required.
  - (line 3) [/learning-objective] value required but none.
  - (line 6) [/screens/0/lab] key 'presenter-script:' is required.
  - (line 8) [/screens/0/lab/presenter-script] value required but none.
modules/DEMO-pull-requests.yml#0: INVALID
  - (line 1) [/] key 'learning-objective:' is required.
  - (line 3) [/learning-objective] value required but none.
  - (line 6) [/screens/0/lab] key 'presenter-script:' is required.
  - (line 8) [/screens/0/lab/presenter-script] value required but none.
Fcourses/github-demo-lab-pages.yml#0: INVALID
  - (line 3) [/configurator_class] key 'configurator_class:' is undefined.
courses/github-demo-single-section.yml#0: INVALID
  - (line 3) [/configurator_class] key 'configurator_class:' is undefined.
courses/issues-demo.yml#0: INVALID
  - (line 3) [/configurator_class] key 'configurator_class:' is undefined.