accounts: "Security" gives an exception with CERN login

[GraemeWatt]

Clicking "Security" gives an exception for an account connected via CERN OAuth:

[2018-09-18 17:12:36,620] ERROR in app: Exception on /account/settings/security/ [GET]
Traceback (most recent call last):
  File "/opt/hepdata/lib/python2.7/site-packages/flask/app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "/opt/hepdata/lib/python2.7/site-packages/flask/app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/opt/hepdata/lib/python2.7/site-packages/flask_cors/extension.py", line 161, in wrapped_function
    return cors_after_request(app.make_response(f(*args, **kwargs)))
  File "/opt/hepdata/lib/python2.7/site-packages/flask/app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/opt/hepdata/lib/python2.7/site-packages/flask/app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "/opt/hepdata/lib/python2.7/site-packages/flask/app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/opt/hepdata/lib/python2.7/site-packages/flask_login.py", line 792, in decorated_view
    return func(*args, **kwargs)
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_accounts/views.py", line 140, in security
    is_current=SessionActivity.is_current
  File "/opt/hepdata/lib/python2.7/site-packages/flask/templating.py", line 134, in render_template
    context, ctx.app)
  File "/opt/hepdata/lib/python2.7/site-packages/flask/templating.py", line 116, in _render
    rv = template.render(context)
  File "/opt/hepdata/lib/python2.7/site-packages/jinja2/environment.py", line 1008, in render
    return self.environment.handle_exception(exc_info, True)
  File "/opt/hepdata/lib/python2.7/site-packages/jinja2/environment.py", line 780, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_accounts/templates/invenio_accounts/settings/security.html", line 32, in top-level template code
    {% set revoke_action = _("Revoke") %}
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_theme/templates/invenio_theme/page_settings.html", line 25, in top-level template code
    {%- extends config.THEME_BASE_TEMPLATE %}
  File "/opt/hepdata/src/hepdata/hepdata/modules/theme/templates/hepdata_theme/page.html", line 25, in top-level template code
    {%- extends "invenio_theme/page.html" %}
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_theme/templates/invenio_theme/page.html", line 73, in top-level template code
    {%- block body %}
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_theme/templates/invenio_theme/page.html", line 79, in block "body"
    {%- block body_inner %}
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_theme/templates/invenio_theme/page.html", line 83, in block "body_inner"
    {%- block page_body %}
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_theme/templates/invenio_theme/page_settings.html", line 49, in block "page_body"
    {%- block settings_content scoped %}
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_theme/templates/invenio_theme/page_settings.html", line 62, in block "settings_content"
    {%- block settings_body scoped %}
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_theme/templates/invenio_theme/page_settings.html", line 64, in block "settings_body"
    {%- block settings_form scoped %}
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_accounts/templates/invenio_accounts/settings/security.html", line 53, in block "settings_form"
    {{session.created | tousertimezone | dateformat}}
  File "/opt/hepdata/lib/python2.7/site-packages/invenio_i18n/jinja2.py", line 42, in filter_to_user_timezone
    return to_user_timezone(dt)
  File "/opt/hepdata/lib/python2.7/site-packages/flask_babelex/__init__.py", line 310, in to_user_timezone
    if datetime.tzinfo is None:
UndefinedError: 'None' has no attribute 'created'

Try upgrading the Invenio packages (#138), particularly invenio-accounts.

[GraemeWatt]

This problem seems to be fixed with the current Invenio packages.