Delay loading modules and objects until gettext is loaded

This was resulting in strings not getting translated, especially when
the calls to gettext came at the lowest indent level of the module.

zenmap/zenmapCore/UmitOptionParser.py

@@ -125,6 +125,7 @@ from zenmapCore.Name import APP_NAME, NMAP_DISPLAY_NAME
 from zenmapCore.Version import VERSION
 import zenmapCore.I18N
 from zenmapCore.BasePaths import base_paths
+from zenmapCore.DelayedObject import DelayedObject
 
 
 class UmitOptionParser(OptionParser):
@@ -259,7 +260,7 @@ used more than once to get even more verbosity"))
         """
         return 40 - (self.options.verbose * 10)
 
-option_parser = UmitOptionParser()
+option_parser = DelayedObject(UmitOptionParser)
 
 if __name__ == "__main__":
     opt = UmitOptionParser()