pylint: Skip hashlib import hackery and remove unused variable

hashlib's dynamic import hackery makes pylint very sad since it cannot
realize that the module has sha256 member (just created dynamically),
so let's just make it skip this error.

Also remove unused variable in virtinst.cli

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>

virtinst/cli.py

@@ -1,7 +1,7 @@
 #
 # Utility functions for the command line drivers
 #
-# Copyright 2006-2007, 2013 Red Hat, Inc.
+# Copyright 2006-2007, 2013, 2014 Red Hat, Inc.
 # Jeremy Katz <katzj@redhat.com>
 #
 # This program is free software; you can redistribute it and/or modify
@@ -95,7 +95,6 @@ class VirtHelpFormatter(argparse.HelpFormatter):
 
 
 def setupParser(usage, description):
-    parse_class = argparse.ArgumentParser
     epilog = _("See man page for examples and full option syntax.")
 
     parser = argparse.ArgumentParser(

virtinst/virtimage.py

@@ -1,7 +1,7 @@
 # Sample code to parse an image XML description and
 # spit out libvirt XML
 #
-# Copyright 2007, 2013 Red Hat, Inc.
+# Copyright 2007, 2013, 2014 Red Hat, Inc.
 # David Lutterkort <dlutter@redhat.com>
 #
 # This program is free software; you can redistribute it and/or modify
@@ -260,7 +260,7 @@ class Disk(object):
         if hashlib:
             if "sha256" in self.csum:
                 csumvalue = self.csum["sha256"]
-                m = hashlib.sha256()
+                m = hashlib.sha256()  # pylint: disable-msg=E1101
 
             elif "sha1" in self.csum:
                 csumvalue = self.csum["sha1"]