'Ubuntu' object has no attribute 'get_distro_release'

[Christopher Yeleighton]

To reproduce, tell Ubuntu Software Centre to display more information about libusb-dev.

Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 781, in on_application_activated
    super(AvailablePane, self).on_application_activated(appview, app)
  File "/usr/share/software-center/softwarecenter/utils.py", line 192, in wrapper
    f(*args, **kwargs)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/softwarepane.py", line 196, in on_application_activated
    vm.display_page(self, self.Pages.DETAILS, self.state)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/session/viewmanager.py", line 183, in display_page
    pane.enter_page(page, view_state)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 653, in enter_page
    self.display_details_page(state)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 734, in display_details_page
    SoftwarePane.display_details_page(self, view_state)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/softwarepane.py", line 387, in display_details_page
    self.app_details_view.show_app(view_state.application)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appdetailsview.py", line 1759, in show_app
    skip_update_addons=skip_update_addons)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appdetailsview.py", line 1559, in _update_all
    self._update_pkg_info_table(app_details)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appdetailsview.py", line 1492, in _update_pkg_info_table
    if app_details.maintenance_status:
  File "/usr/share/software-center/softwarecenter/db/application.py", line 456, in maintenance_status
    self.channelname)
  File "/usr/share/software-center/softwarecenter/distro/ubuntu.py", line 207, in get_maintenance_status
    "Ubuntu.") % (appname, self.get_distro_release())
AttributeError: 'Ubuntu' object has no attribute 'get_distro_release'

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: software-center 13.10-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.13.0-53.89-generic 3.13.11-ckt19
Uname: Linux 3.13.0-53-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Jun 8 21:17:12 2015
InstallationDate: Installed on 2014-08-20 (292 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
PackageArchitecture: all
SourcePackage: software-center
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.