Description of problem:
firstboot will not display
The following traceback is written to stderr when I run firstboot....

INFO:firstboot.loader:loading module rhsm_login
DEBUG:rhsm-app.subscription_manager.identity:Loading consumer info from identity certificates.
DEBUG:rhsm.profile:Loading current RPM profile.
INFO:rhsm.connection:Using certificate authentication: key = /etc/pki/consumer/key.pem, cert = /etc/pki/consumer/cert.pem, ca = /etc/rhsm/ca/, insecure = False
INFO:rhsm.connection:Connection Built: host: jsefler-f14-candlepin.usersys.redhat.com, port: 8443, handler: /candlepin
DEBUG:rhsm.connection:ContectConnection
DEBUG:rhsm-app.subscription_manager.certdirectory:Installed product IDs: ['99000', '37060']
DEBUG:rhsm-app.subscription_manager.cert_sorter:Unregistered, skipping server compliance check.
DEBUG:rhsm-app.subscription_manager.plugins:Not loading "dbus_event.DbusEventPlugin" plugin as it is disabled
DEBUG:rhsm-app.subscription_manager.plugins:<class 'dbus_event.DbusEventPlugin'> was disabled via it's config: plugin_key: dbus_event.DbusEventPlugin
config file: /etc/rhsm/pluginconf.d/dbus_event.DbusEventPlugin.conf
[main]
enabled=0

DEBUG:rhsm-app.subscription_manager.plugins:loaded plugin modules: [<module 'all_slots_test' from '/usr/share/rhsm-plugins/all_slots_test.pyc'>, <module 'auto_attach_test' from '/usr/share/rhsm-plugins/auto_attach_test.pyc'>, <module 'dbus_event' from '/usr/share/rhsm-plugins/dbus_event.pyc'>, <module 'facts_collection_test' from '/usr/share/rhsm-plugins/facts_collection_test.pyc'>, <module 'product_id_install_test' from '/usr/share/rhsm-plugins/product_id_install_test.pyc'>, <module 'register_consumer_test1' from '/usr/share/rhsm-plugins/register_consumer_test1.pyc'>, <module 'register_consumer_test2' from '/usr/share/rhsm-plugins/register_consumer_test2.pyc'>, <module 'subscribe_test' from '/usr/share/rhsm-plugins/subscribe_test.pyc'>]
DEBUG:rhsm-app.subscription_manager.plugins:loaded plugins: {'register_consumer_test2.RegisterConsumerTestPlugin': <register_consumer_test2.RegisterConsumerTestPlugin object at 0x2276f50>, 'subscribe_test.SubscribeTestPlugin': <subscribe_test.SubscribeTestPlugin object at 0x2238450>, 'all_slots_test.AllSlotsTestPlugin': <all_slots_test.AllSlotsTestPlugin object at 0x21761d0>, 'product_id_install_test.ProductIdInstallTestPlugin': <product_id_install_test.ProductIdInstallTestPlugin object at 0x22765d0>, 'auto_attach_test.AutoAttachTestPlugin': <auto_attach_test.AutoAttachTestPlugin object at 0x2176890>, 'register_consumer_test1.RegisterConsumerTestPlugin': <register_consumer_test1.RegisterConsumerTestPlugin object at 0x2276a90>, 'facts_collection_test.FactsCollectionTestPlugin': <facts_collection_test.FactsCollectionTestPlugin object at 0x2276110>}
DEBUG:rhsm-app.rhsm_login:Distribution: ('Red Hat Enterprise Linux Server', '7.0', 'Maipo', 'beta')
DEBUG:rhsm-app.rhsm_login:Running standalone firstboot: True
INFO:root:Setting size to 1280x1024
Error in sys.excepthook:
Traceback (most recent call last):
  File "/sbin/firstboot", line 96, in <lambda>
    config)
  File "/sbin/firstboot", line 56, in exception_handler
    dump_obj = meh.dump.ExceptionDump((type, value, tb), meh_conf)
  File "/usr/lib/python2.7/site-packages/meh/dump.py", line 49, in __init__
    if inspect.istraceback(exc_info.stack):
AttributeError: 'tuple' object has no attribute 'stack'

Original exception was:
Traceback (most recent call last):
  File "/sbin/firstboot", line 166, in <module>
    reboot_required = config.interface.run()
  File "/usr/lib/python2.7/site-packages/firstboot/interface.py", line 459, in run
    self.displayModule()
  File "/usr/lib/python2.7/site-packages/firstboot/interface.py", line 367, in displayModule
    currentModule.initializeUI()
  File "/usr/share/firstboot/modules/rhsm_login.py", line 375, in initializeUI
    self.show()
  File "/usr/share/rhsm/subscription_manager/gui/registergui.py", line 161, in show
    self._set_initial_screen()
  File "/usr/share/firstboot/modules/rhsm_login.py", line 251, in _set_initial_screen
    self._set_screen(registergui.INFO_PAGE)
  File "/usr/share/rhsm/subscription_manager/gui/registergui.py", line 185, in _set_screen
    self.register_dialog.set_title(_("System Registration"))
AttributeError: 'gtk.VBox' object has no attribute 'set_title'



Version-Release number of selected component (if applicable):
[root@jsefler-7 ~]# rpm -qa | grep subscription-manager
subscription-manager-1.10.12-1.el7.x86_64
subscription-manager-gui-1.10.12-1.el7.x86_64
subscription-manager-firstboot-1.10.12-1.el7.x86_64


How reproducible:


Steps to Reproduce:
1. rm -f /etc/sysconfig/firstboot
2. firstboot



Actual results:
Traceback above with no display for firstboot

Expected results:


Additional info: