Snap packages do not need a date any more

[James Jesudason]

The hexr parser is expecting a date for snap packages, but that field has been removed. This is blocking submissions from being processed by C3:

[2016-05-23 15:57:59,285: ERROR/MainProcess] Task uploads.tasks.create_machinereport_task[f4ccbc56-83b0-42b2-9ec2-a95221745ca8] raised exception: KeyError(u'date',)
Traceback (most recent call last):
  File "/srv/certification.staging.canonical.com/production/certification-219/lib/python2.7/site-packages/celery/task/trace.py", line 228, in trace_task
    R = retval = fun(*args, **kwargs)
  File "/srv/certification.staging.canonical.com/production/certification-219/lib/python2.7/site-packages/celery/task/trace.py", line 415, in __protected_call__
    return self.run(*args, **kwargs)
  File "/srv/certification.staging.canonical.com/production/certification-219/apps/uploads/tasks.py", line 31, in create_machinereport_task
    parse_stream(StringIO(submission.data)),
  File "/srv/certification.staging.canonical.com/production/certification-219/apps/uploads/checkbox_parser.py", line 22, in parse_stream
    parser.run(TestRun, messages=messages)
  File "/srv/certification.staging.canonical.com/production/certification-219/lib/python2.7/site-packages/checkbox_support/parsers/submission.py", line 1297, in run
    self.parseRoot(result, root)
  File "/srv/certification.staging.canonical.com/production/certification-219/lib/python2.7/site-packages/checkbox_support/parsers/submission.py", line 1270, in parseRoot
    parser(result, child)
  File "/srv/certification.staging.canonical.com/production/certification-219/lib/python2.7/site-packages/checkbox_support/parsers/submission.py", line 1227, in parseSoftware
    parser(result, child)
  File "/srv/certification.staging.canonical.com/production/certification-219/lib/python2.7/site-packages/checkbox_support/parsers/submission.py", line 1124, in parseSnapPackages
    result.addSnapPackage(snap_package)
  File "/srv/certification.staging.canonical.com/production/certification-219/lib/python2.7/site-packages/checkbox_support/parsers/submission.py", line 860, in addSnapPackage
    "date": snap_package["properties"]["date"],
KeyError: u'date'

[Sheila Miguez (codersquid)]

This is released to staging. I created a machine record and submitted the previously failing submission. https://certification.staging.canonical.com/hardware/201606-41581/submission/107447/

[Sheila Miguez (codersquid)]

Forgot to note, with checkbox 0.26.dev0.

[Ara Pulido (ara)]

Moving this to Fix Committed until we have this in production