Description of problem: PyGI warnings displayed when started from a terminal window

Version-Release number of selected component (if applicable): 1.5.7 9.fc25

How reproducible: Every time

Steps to Reproduce: $ system-config-printer

Actual results: See below

Expected results: No warning messages


Additional info: Here's what I see (Rawhide on an AMD-8/12GB memory, dual monitor, running GNOME (Xorg)):

$ system-config-printer
/usr/share/system-config-printer/system-config-printer.py:31: PyGIWarning: Polkit was imported without specifying a version first. Use gi.require_version('Polkit', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import Polkit
/usr/share/system-config-printer/system-config-printer.py:35: PyGIWarning: GdkPixbuf was imported without specifying a version first. Use gi.require_version('GdkPixbuf', '2.0') before import to ensure that the right version gets loaded.
  from gi.repository import GdkPixbuf
/usr/share/system-config-printer/system-config-printer.py:37: PyGIWarning: Gdk was imported without specifying a version first. Use gi.require_version('Gdk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gdk
/usr/share/system-config-printer/system-config-printer.py:38: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk
/usr/share/system-config-printer/jobviewer.py:28: PyGIWarning: Notify was imported without specifying a version first. Use gi.require_version('Notify', '0.7') before import to ensure that the right version gets loaded.
  from gi.repository import Notify
/usr/share/system-config-printer/jobviewer.py:55: PyGIWarning: GnomeKeyring was imported without specifying a version first. Use gi.require_version('GnomeKeyring', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import GnomeKeyring