Import/Export MRs not showing the diff changes

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Some failures are related to parsing date:

NoMethodError - undefined method `strftime' for "2016-05-01T17:38:14.000+02:00":String
Did you mean?  strip:
  app/helpers/application_helper.rb:170:in `time_ago_with_tooltip'
  app/views/projects/commits/_commit.html.haml:35:in `block in _app_views_projects_commits__commit_html_haml___2213262090220783503_70265263037200'
  actionview (4.2.8) lib/action_view/helpers/cache_helper.rb:117:in `cache'
  app/views/projects/commits/_commit.html.haml:11:in `_app_views_projects_commits__commit_html_haml___2213262090220783503_70265263037200'
  actionview (4.2.8) lib/action_view/template.rb:145:in `block in render'
  activesupport (4.2.8) lib/active_support/notifications.rb:166:in `instrument'
  actionview (4.2.8) lib/action_view/template.rb:333:in `instrument'
  actionview (4.2.8) lib/action_view/template.rb:143:in `render'
  actionview (4.2.8) lib/action_view/renderer/partial_renderer.rb:436:in `block in collection_with_template'

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