feat: schema validation, add choice + zeroOrMore for DataObjectGroup (closes #35)

--HG--
branch : seda21
5 jobs for topic/seda21/choice_zero in 2 minutes and 12 seconds (queued for 33 minutes and 35 seconds)
Status Job ID Name Coverage
  Lint
passed check-manifest #427142

00:01:15

failed flake8 #427141

00:02:12

passed yamllint #427143

00:02:07

 
  Tests
skipped py3 #427144
 
  Build Debian Package
skipped build-debian #427145
manual
 
Name Stage Failure
failed
flake8 Lint
ERROR: InvocationError for command /builds/cubicweb/cubes/seda/.tox/flake8/bin/flake8 . (exited with code 1)
___________________________________ summary ____________________________________
ERROR: flake8: commands failed
Uploading artifacts for failed job
Uploading artifacts...
gl-code-quality-report.json: found 1 matching files and directories

Uploading artifacts as "codequality" to coordinator... ok
id=427141 responseStatus=201 Created token=qb7HCaTt
Cleaning up file based variables
ERROR: Job failed: command terminated with exit code 1