examples: use GLib.MainLoop instead of deprecated GObject.MainLoop in python

jklimes:
made the change for new firewall-zone.py example as well.

examples/python/gi/device-state-ip4config.py

@@ -21,7 +21,7 @@
 #
 
 import sys
-from gi.repository import GObject, NetworkManager, NMClient
+from gi.repository import GLib, NetworkManager, NMClient
 
 #
 #  This example shows how to get NMIP4Config from NMDevice after it is activated.
@@ -59,6 +59,6 @@ if __name__ == "__main__":
     print "---------------------------------------"
 
     dev.connect('state-changed', state_changed)
-    main_loop = GObject.MainLoop()
+    main_loop = GLib.MainLoop()
     main_loop.run()
 

examples/python/gi/firewall-zone.py

@@ -20,7 +20,7 @@
 #
 
 import sys
-from gi.repository import GObject, NetworkManager, NMClient
+from gi.repository import GLib, NetworkManager, NMClient
 
 #
 # This example demonstrates how to get and change firewall zone in a
@@ -77,7 +77,7 @@ if __name__ == "__main__":
     if len(sys.argv) != 2 and len(sys.argv) != 3:
         sys.exit('Usage: %s <connection name or UUID> [new zone]' % sys.argv[0])
 
-    main_loop = GObject.MainLoop()
+    main_loop = GLib.MainLoop()
     settings = NMClient.RemoteSettings.new(None);
 
     # Connections are read asynchronously, so we have to wait for the

examples/python/gi/list-connections.py

@@ -18,7 +18,7 @@
 # Copyright (C) 2012 Red Hat, Inc.
 #
 
-from gi.repository import GObject, NetworkManager, NMClient
+from gi.repository import GLib, NetworkManager, NMClient
 
 # This example asks settings service for all configured connections.
 # Unfortunately, at this time since libnm-glib still makes heavy use of
@@ -40,7 +40,7 @@ def connections_read(settings):
     main_loop.quit()    
 
 if __name__ == "__main__":
-    main_loop = GObject.MainLoop()
+    main_loop = GLib.MainLoop()
     settings = NMClient.RemoteSettings.new(None);
 
     # connections are read asynchronously, so we need to wait for the